diff --git a/apps/desktop/src/components/grid/DataGrid.vue b/apps/desktop/src/components/grid/DataGrid.vue
index 35f20db265..1e1da18753 100644
--- a/apps/desktop/src/components/grid/DataGrid.vue
+++ b/apps/desktop/src/components/grid/DataGrid.vue
@@ -288,7 +288,7 @@ import {
 import { normalizeResultPageSize, resultPageSizeMenuOptions } from "@/lib/dataGrid/paginationPageSize";
 import { dataGridPageSizeSettingsPatch, preferredDataGridPageSize, resolveDataGridPageSizePreference, type DataGridPageSizePreference } from "@/lib/dataGrid/dataGridPageSizePreference";
 import { continuousQueryResultMaxRows, effectiveQueryResultMaxRows } from "@/lib/dataGrid/queryResultRowLimit";
-import { allNullColumnIndexes } from "@/lib/dataGrid/dataGridColumnVisibility";
+import { allNullColumnIndexes, identicalValueColumnIndexes } from "@/lib/dataGrid/dataGridColumnVisibility";
 import { buildDataGridColumnLookupItems, dataGridColumnCommentFor, filterDataGridColumnLookupItems } from "@/lib/dataGrid/dataGridColumnLookup";
 import { uniqueDataGridColumnOrderKeys } from "@/lib/dataGrid/dataGridColumnOrder";
 import { dataGridColumnLayoutScopeKey, TABLE_DATA_GRID_COLUMN_ORDER_CHANGED_EVENT, tableDataGridColumnOrderScopeKey } from "@/lib/dataGrid/dataGridColumnLayoutStorage";
@@ -2744,6 +2744,24 @@ function showAllColumns() {
   void nextTick(scheduleColumnLayoutRefresh);
 }
 
+function getComparisonRows(): ReadonlyArray<ReadonlyArray<unknown>> {
+  // 比较行必须取全宽 data：identicalValueColumnIndexes 的候选索引是原始列索引，
+  // 不能用经过可见列投影（visibleRowData 重排）后的行。
+  const affected = affectedRowIds();
+  if (affected.length > 1) {
+    const affectedSet = new Set(affected);
+    return displayItems.value.filter((item) => affectedSet.has(item.id) && !item.isDraft).map((item) => item.data);
+  }
+  const displayRows = displayItems.value.filter((item) => !item.isDraft).map((item) => item.data);
+  return displayRows.length > 0 ? displayRows : props.result.rows;
+}
+
+function hideIdenticalColumns() {
+  const identical = identicalValueColumnIndexes(getComparisonRows(), visibleColumnIndexes.value);
+  if (identical.length === 0) return;
+  hideColumns(identical);
+}
+
 // --- 表头拖拽进 SQL 编辑器：目标导向模式切换的控制器 ---
 // 按选择顺序（Set 插入序）取列名；被拖列未选中时仅拖该列。
 function columnReferenceDragNames(draggedVisibleColIdx: number): string[] | null {
@@ -12597,6 +12615,11 @@ const gridContextMenuItems = computed<ContextMenuItem[]>(() => {
     }
   }
 
+  const comparisonRows = getComparisonRows();
+  const identicalColumnIndexes = identicalValueColumnIndexes(comparisonRows, visibleColumnIndexes.value);
+  const canHideIdenticalColumns = identicalColumnIndexes.length > 0;
+  const identicalColumnCount = identicalColumnIndexes.length;
+
   return createDataGridContextMenuItems(
     createDataGridColumnContextMenuItems({
       headerColumn: !!contextHeaderColumn.value,
@@ -12612,6 +12635,7 @@ const gridContextMenuItems = computed<ContextMenuItem[]>(() => {
       selectedColumnCount,
       visibleColumnCount: visibleColumnCount.value,
       hiddenColumnCount: hiddenColumnCount.value,
+      canHideIdenticalColumns,
       labels: {
         copyName:
           selectedColumnNamesForCopy.value.length > 1
@@ -12634,6 +12658,7 @@ const gridContextMenuItems = computed<ContextMenuItem[]>(() => {
         unfreezeColumns: t("grid.unfreezeColumns", { count: frozenColumnCount.value }),
         hideColumn: t("grid.hideColumn"),
         hideSelectedColumns: t("grid.hideSelectedColumns", { count: selectedColumnCount }),
+        hideIdenticalColumns: identicalColumnCount > 0 ? t("grid.hideIdenticalColumnsCount", { count: identicalColumnCount }) : t("grid.hideIdenticalColumns"),
         showAllColumnsMenu: t("grid.showAllColumnsMenu"),
       },
       icons: {
@@ -12679,6 +12704,7 @@ const gridContextMenuItems = computed<ContextMenuItem[]>(() => {
         },
         hideColumn: hideContextColumn,
         hideSelectedColumns,
+        hideIdenticalColumns,
         showAllColumnsMenu: showAllColumns,
       },
       filterSubmenu: filterSubmenu(),
diff --git a/apps/desktop/src/i18n/locales/az.ts b/apps/desktop/src/i18n/locales/az.ts
index 8fc866673e..e03bd0edda 100644
--- a/apps/desktop/src/i18n/locales/az.ts
+++ b/apps/desktop/src/i18n/locales/az.ts
@@ -2135,6 +2135,8 @@ export default withEnglishFallback({
     unfreezeColumns: "Sütunların sabitlənməsini ləğv et ({count})",
     hideColumn: "Bu sütunu gizlət",
     hideSelectedColumns: "Seçilmiş sütunları gizlət ({count})",
+    hideIdenticalColumns: "Eyni dəyərlərə malik sütunları gizlət",
+    hideIdenticalColumnsCount: "Eyni dəyərlərə malik sütunları gizlət ({count})",
     showAllColumnsMenu: "Bütün sütunları göstər",
     pasted: "Yerləşdirildi!",
     batchAppendPasteNotEditable: "Bu nəticəni redaktə etmək mümkün deyil.",
diff --git a/apps/desktop/src/i18n/locales/en.ts b/apps/desktop/src/i18n/locales/en.ts
index fd7bcefe59..019a30b854 100644
--- a/apps/desktop/src/i18n/locales/en.ts
+++ b/apps/desktop/src/i18n/locales/en.ts
@@ -2548,6 +2548,8 @@ export default {
     unfreezeColumns: "Unfreeze Columns ({count})",
     hideColumn: "Hide This Column",
     hideSelectedColumns: "Hide Selected Columns ({count})",
+    hideIdenticalColumns: "Hide Columns with Identical Values",
+    hideIdenticalColumnsCount: "Hide Columns with Identical Values ({count})",
     showAllColumnsMenu: "Show All Columns",
     pasted: "Pasted!",
     batchAppendPasteNotEditable: "This result cannot be edited.",
diff --git a/apps/desktop/src/i18n/locales/es.ts b/apps/desktop/src/i18n/locales/es.ts
index eae07d676c..c4d95c6557 100644
--- a/apps/desktop/src/i18n/locales/es.ts
+++ b/apps/desktop/src/i18n/locales/es.ts
@@ -2388,6 +2388,8 @@ export default withEnglishFallback({
     unfreezeColumns: "Desinmovilizar columnas ({count})",
     hideColumn: "Ocultar esta columna",
     hideSelectedColumns: "Ocultar columnas seleccionadas ({count})",
+    hideIdenticalColumns: "Ocultar columnas con valores idénticos",
+    hideIdenticalColumnsCount: "Ocultar columnas con valores idénticos ({count})",
     showAllColumnsMenu: "Mostrar todas las columnas",
     pasted: "¡Pegado!",
     search: "Buscar...",
diff --git a/apps/desktop/src/i18n/locales/id.ts b/apps/desktop/src/i18n/locales/id.ts
index 7562212410..b72b151834 100644
--- a/apps/desktop/src/i18n/locales/id.ts
+++ b/apps/desktop/src/i18n/locales/id.ts
@@ -2407,6 +2407,8 @@ export default withEnglishFallback({
     unfreezeColumns: "Batalkan Pembekuan Kolom ({count})",
     hideColumn: "Sembunyikan Kolom Ini",
     hideSelectedColumns: "Sembunyikan Kolom Terpilih ({count})",
+    hideIdenticalColumns: "Sembunyikan Kolom dengan Nilai yang Sama",
+    hideIdenticalColumnsCount: "Sembunyikan Kolom dengan Nilai yang Sama ({count})",
     showAllColumnsMenu: "Tampilkan Semua Kolom",
     pasted: "Ditempel!",
     batchAppendPasteNotEditable: "Hasil ini tidak dapat diedit.",
diff --git a/apps/desktop/src/i18n/locales/it.ts b/apps/desktop/src/i18n/locales/it.ts
index d40deb3fb9..756b0576a4 100644
--- a/apps/desktop/src/i18n/locales/it.ts
+++ b/apps/desktop/src/i18n/locales/it.ts
@@ -2282,6 +2282,8 @@ export default withEnglishFallback({
     unfreezeColumns: "Sblocca colonne ({count})",
     hideColumn: "Nascondi questa colonna",
     hideSelectedColumns: "Nascondi colonne selezionate ({count})",
+    hideIdenticalColumns: "Nascondi colonne con valori identici",
+    hideIdenticalColumnsCount: "Nascondi colonne con valori identici ({count})",
     showAllColumnsMenu: "Mostra tutte le colonne",
     pasted: "Incollato!",
     search: "Cerca...",
diff --git a/apps/desktop/src/i18n/locales/ja.ts b/apps/desktop/src/i18n/locales/ja.ts
index ad6a3749c7..52b88cbb68 100644
--- a/apps/desktop/src/i18n/locales/ja.ts
+++ b/apps/desktop/src/i18n/locales/ja.ts
@@ -2289,6 +2289,8 @@ export default withEnglishFallback({
     unfreezeColumns: "列の固定を解除 ({count})",
     hideColumn: "この列を非表示",
     hideSelectedColumns: "選択した列を非表示 ({count})",
+    hideIdenticalColumns: "同一値の列を非表示",
+    hideIdenticalColumnsCount: "同一値の列を非表示（{count} 列）",
     showAllColumnsMenu: "すべての列を表示",
     pasted: "貼り付けました！",
     search: "検索...",
diff --git a/apps/desktop/src/i18n/locales/ko.ts b/apps/desktop/src/i18n/locales/ko.ts
index 0aac038b48..a2bd13ed78 100644
--- a/apps/desktop/src/i18n/locales/ko.ts
+++ b/apps/desktop/src/i18n/locales/ko.ts
@@ -2326,6 +2326,8 @@ export default withEnglishFallback({
     unfreezeColumns: "컬럼 고정 해제 ({count})",
     hideColumn: "이 컬럼 숨기기",
     hideSelectedColumns: "선택한 컬럼 숨기기 ({count})",
+    hideIdenticalColumns: "동일한 값의 컬럼 숨기기",
+    hideIdenticalColumnsCount: "동일한 값의 컬럼 숨기기 ({count}개)",
     showAllColumnsMenu: "모든 컬럼 표시",
     pasted: "붙여넣었습니다!",
     replaceText: "바꿀 내용",
diff --git a/apps/desktop/src/i18n/locales/pt-BR.ts b/apps/desktop/src/i18n/locales/pt-BR.ts
index 8c9ae5c0c5..91d142d12c 100644
--- a/apps/desktop/src/i18n/locales/pt-BR.ts
+++ b/apps/desktop/src/i18n/locales/pt-BR.ts
@@ -2284,6 +2284,8 @@ export default withEnglishFallback({
     unfreezeColumns: "Descongelar colunas ({count})",
     hideColumn: "Ocultar esta coluna",
     hideSelectedColumns: "Ocultar colunas selecionadas ({count})",
+    hideIdenticalColumns: "Ocultar colunas com valores idênticos",
+    hideIdenticalColumnsCount: "Ocultar colunas com valores idênticos ({count})",
     showAllColumnsMenu: "Mostrar todas as colunas",
     pasted: "Colado!",
     search: "Pesquisar...",
diff --git a/apps/desktop/src/i18n/locales/ru.ts b/apps/desktop/src/i18n/locales/ru.ts
index a2908b2a8a..472cbf574e 100644
--- a/apps/desktop/src/i18n/locales/ru.ts
+++ b/apps/desktop/src/i18n/locales/ru.ts
@@ -2442,6 +2442,8 @@ export default withEnglishFallback({
     unfreezeColumns: "Открепить столбцы ({count})",
     hideColumn: "Скрыть этот столбец",
     hideSelectedColumns: "Скрыть выбранные столбцы ({count})",
+    hideIdenticalColumns: "Скрыть столбцы с одинаковыми значениями",
+    hideIdenticalColumnsCount: "Скрыть столбцы с одинаковыми значениями ({count})",
     showAllColumnsMenu: "Показать все столбцы",
     pasted: "Вставлено!",
     batchAppendPasteNotEditable: "Этот результат нельзя редактировать.",
diff --git a/apps/desktop/src/i18n/locales/tr.ts b/apps/desktop/src/i18n/locales/tr.ts
index 4d3cf134c0..8dd78a5675 100644
--- a/apps/desktop/src/i18n/locales/tr.ts
+++ b/apps/desktop/src/i18n/locales/tr.ts
@@ -2128,6 +2128,8 @@ export default withEnglishFallback({
     unfreezeColumns: "Sütun Dondurmayı Kaldır ({count})",
     hideColumn: "Bu Sütunu Gizle",
     hideSelectedColumns: "Seçili Sütunları Gizle ({count})",
+    hideIdenticalColumns: "Aynı Değerlere Sahip Sütunları Gizle",
+    hideIdenticalColumnsCount: "Aynı Değerlere Sahip Sütunları Gizle ({count})",
     showAllColumnsMenu: "Tüm Sütunları Göster",
     pasted: "Yapıştırıldı!",
     batchAppendPasteNotEditable: "Bu sonuç düzenlenemez.",
diff --git a/apps/desktop/src/i18n/locales/zh-CN.ts b/apps/desktop/src/i18n/locales/zh-CN.ts
index f5db8b647d..cea4e03d94 100644
--- a/apps/desktop/src/i18n/locales/zh-CN.ts
+++ b/apps/desktop/src/i18n/locales/zh-CN.ts
@@ -2483,6 +2483,8 @@ export default withEnglishFallback({
     unfreezeColumns: "取消冻结（{count} 列）",
     hideColumn: "隐藏此列",
     hideSelectedColumns: "隐藏选中列（{count} 列）",
+    hideIdenticalColumns: "隐藏相同数值列",
+    hideIdenticalColumnsCount: "隐藏相同数值列（{count} 列）",
     showAllColumnsMenu: "显示全部列",
     pasted: "已粘贴!",
     batchAppendPasteNotEditable: "当前结果不可编辑。",
diff --git a/apps/desktop/src/i18n/locales/zh-TW.ts b/apps/desktop/src/i18n/locales/zh-TW.ts
index 95075b15f5..fe22c78aa4 100644
--- a/apps/desktop/src/i18n/locales/zh-TW.ts
+++ b/apps/desktop/src/i18n/locales/zh-TW.ts
@@ -2284,6 +2284,8 @@ export default withEnglishFallback({
     unfreezeColumns: "取消凍結（{count} 欄）",
     hideColumn: "隱藏此欄",
     hideSelectedColumns: "隱藏選取欄（{count} 欄）",
+    hideIdenticalColumns: "隱藏相同數值欄",
+    hideIdenticalColumnsCount: "隱藏相同數值欄（{count} 欄）",
     showAllColumnsMenu: "顯示全部欄",
     pasted: "已貼上！",
     search: "搜尋……",
diff --git a/apps/desktop/src/lib/__tests__/dataGrid/dataGridContextMenu.spec.ts b/apps/desktop/src/lib/__tests__/dataGrid/dataGridContextMenu.spec.ts
index 7e978e088e..940e88ee8c 100644
--- a/apps/desktop/src/lib/__tests__/dataGrid/dataGridContextMenu.spec.ts
+++ b/apps/desktop/src/lib/__tests__/dataGrid/dataGridContextMenu.spec.ts
@@ -139,7 +139,7 @@ describe("dataGridContextMenu", () => {
     expect(rowItems.find((item) => item.label === "delete")?.variant).toBe("destructive");
   });
 
-  function columnMenuItems(overrides: { hasColumnSelection?: boolean; selectedColumnCount?: number; visibleColumnCount?: number; hiddenColumnCount?: number }) {
+  function columnMenuItems(overrides: { headerColumn?: boolean; contextColumn?: boolean; contextVisibleColIdx?: number; hasColumnSelection?: boolean; selectedColumnCount?: number; visibleColumnCount?: number; hiddenColumnCount?: number; canHideIdenticalColumns?: boolean }) {
     const action = vi.fn();
     const filter = createDataGridFilterSubmenu({
       label: "filter",
@@ -149,13 +149,13 @@ describe("dataGridContextMenu", () => {
       clear: action,
     });
     return createDataGridColumnContextMenuItems({
-      headerColumn: true,
-      contextColumn: false,
+      headerColumn: overrides.headerColumn ?? true,
+      contextColumn: overrides.contextColumn ?? false,
       canCopyAlterSql: false,
       canFilter: false,
       hasSort: false,
       sortMode: "database",
-      contextVisibleColIdx: 0,
+      contextVisibleColIdx: overrides.contextVisibleColIdx !== undefined ? overrides.contextVisibleColIdx : 0,
       hasColumnSelection: false,
       selectedColumnCount: 1,
       visibleColumnCount: 3,
@@ -175,10 +175,11 @@ describe("dataGridContextMenu", () => {
         unfreezeColumns: "unfreeze",
         hideColumn: "hide column",
         hideSelectedColumns: "hide selected (3)",
+        hideIdenticalColumns: "hide identical",
         showAllColumnsMenu: "show all columns",
       },
       icons: { copy: icon, columnDetails: icon, database: icon, ascending: icon, descending: icon, clearSort: icon },
-      actions: { copyName: action, copyNames: action, details: action, copyAlterSql: action, sort: action, freezeToColumn: action, freezeSelectedColumns: action, unfreezeColumns: action, hideColumn: action, hideSelectedColumns: action, showAllColumnsMenu: action },
+      actions: { copyName: action, copyNames: action, details: action, copyAlterSql: action, sort: action, freezeToColumn: action, freezeSelectedColumns: action, unfreezeColumns: action, hideColumn: action, hideSelectedColumns: action, hideIdenticalColumns: action, showAllColumnsMenu: action },
       filterSubmenu: filter,
       ...overrides,
     });
@@ -221,4 +222,30 @@ describe("dataGridContextMenu", () => {
     expect(hideColumn).toBeDefined();
     expect(hideColumn?.disabled).toBe(false);
   });
+
+  it("offers hide identical columns on a header and disables it when no identical columns exist", () => {
+    const items = columnMenuItems({ canHideIdenticalColumns: false });
+    const hideIdentical = items.find((item) => item.label === "hide identical");
+
+    expect(hideIdentical).toBeDefined();
+    expect(hideIdentical?.disabled).toBe(true);
+  });
+
+  it("enables hide identical columns when identical columns exist", () => {
+    const items = columnMenuItems({ canHideIdenticalColumns: true });
+    const hideIdentical = items.find((item) => item.label === "hide identical");
+
+    expect(hideIdentical).toBeDefined();
+    expect(hideIdentical?.disabled).toBe(false);
+  });
+
+  it("offers hide identical columns on a cell context menu and shows recovery entry if hidden columns exist", () => {
+    const items = columnMenuItems({ headerColumn: false, contextColumn: true, contextVisibleColIdx: undefined, canHideIdenticalColumns: true, hiddenColumnCount: 2 });
+    const hideIdentical = items.find((item) => item.label === "hide identical");
+    const showAll = items.find((item) => item.label === "show all columns");
+
+    expect(hideIdentical).toBeDefined();
+    expect(hideIdentical?.disabled).toBe(false);
+    expect(showAll).toBeDefined();
+  });
 });
diff --git a/apps/desktop/src/lib/dataGrid/dataGridColumnVisibility.ts b/apps/desktop/src/lib/dataGrid/dataGridColumnVisibility.ts
index 948cba37ac..a302ae2596 100644
--- a/apps/desktop/src/lib/dataGrid/dataGridColumnVisibility.ts
+++ b/apps/desktop/src/lib/dataGrid/dataGridColumnVisibility.ts
@@ -149,3 +149,49 @@ export function removeAutoHiddenColumnIndexes(hiddenIndexes: ReadonlySet<number>
   }
   return next;
 }
+
+export function areCellValuesEqual(a: unknown, b: unknown): boolean {
+  if (a === b) return true;
+  if (typeof a === "number" && typeof b === "number" && Number.isNaN(a) && Number.isNaN(b)) return true;
+  if (a === null || b === null || a === undefined || b === undefined) return false;
+  if (typeof a !== "object" || typeof b !== "object") return false;
+  if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();
+  if (a instanceof Uint8Array && b instanceof Uint8Array) {
+    if (a.length !== b.length) return false;
+    for (let i = 0; i < a.length; i++) {
+      if (a[i] !== b[i]) return false;
+    }
+    return true;
+  }
+  try {
+    return JSON.stringify(a) === JSON.stringify(b);
+  } catch {
+    return false;
+  }
+}
+
+export function identicalValueColumnIndexes(rows: ReadonlyArray<ReadonlyArray<unknown>>, candidateIndexes: readonly number[]): number[] {
+  if (rows.length < 2) return [];
+  const candidates = [...candidateIndexes];
+  let count = candidates.length;
+  if (count === 0) return [];
+
+  const firstRow = rows[0];
+  if (!firstRow) return [];
+
+  for (let rowIndex = 1; rowIndex < rows.length; rowIndex++) {
+    const row = rows[rowIndex];
+    if (!row) continue;
+    let write = 0;
+    for (let read = 0; read < count; read++) {
+      const col = candidates[read]!;
+      if (areCellValuesEqual(row[col], firstRow[col])) {
+        candidates[write++] = col;
+      }
+    }
+    count = write;
+    if (count === 0) return [];
+  }
+  candidates.length = count;
+  return candidates;
+}
diff --git a/apps/desktop/src/lib/dataGrid/dataGridContextMenu.ts b/apps/desktop/src/lib/dataGrid/dataGridContextMenu.ts
index 29823f3fb7..cbaddacebb 100644
--- a/apps/desktop/src/lib/dataGrid/dataGridContextMenu.ts
+++ b/apps/desktop/src/lib/dataGrid/dataGridContextMenu.ts
@@ -87,11 +87,12 @@ export function createDataGridColumnContextMenuItems(options: {
   visibleColumnCount?: number;
   /** 当前被隐藏的列数量，用于决定是否显示「显示全部列」。 */
   hiddenColumnCount?: number;
+  canHideIdenticalColumns?: boolean;
   labels: Record<
     "copyName" | "copyNames" | "details" | "copyAlterSql" | "databaseAscending" | "databaseDescending" | "localAscending" | "localDescending" | "clearSort" | "freezeToColumn" | "freezeSelectedColumns" | "unfreezeColumns" | "hideColumn" | "hideSelectedColumns" | "showAllColumnsMenu",
     string
   > &
-    Partial<Record<"freezeCurrentColumn" | "unfreezeCurrentColumn", string>>;
+    Partial<Record<"freezeCurrentColumn" | "unfreezeCurrentColumn" | "hideIdenticalColumns", string>>;
   icons: Pick<DataGridContextMenuIcons, "copy" | "columnDetails" | "database" | "ascending" | "descending" | "clearSort">;
   actions: {
     copyName: () => void;
@@ -106,6 +107,7 @@ export function createDataGridColumnContextMenuItems(options: {
     unfreezeColumns: () => void;
     hideColumn: () => void;
     hideSelectedColumns: () => void;
+    hideIdenticalColumns?: () => void;
     showAllColumnsMenu: () => void;
   };
   filterSubmenu: DataGridContextMenuItem;
@@ -141,6 +143,13 @@ export function createDataGridColumnContextMenuItems(options: {
     if (options.hasColumnSelection && selectedColumnCount > 1) {
       items.push({ label: options.labels.hideSelectedColumns, action: options.actions.hideSelectedColumns, disabled: visibleColumnCount > 0 && selectedColumnCount >= visibleColumnCount });
     }
+    if (options.labels.hideIdenticalColumns && options.actions.hideIdenticalColumns) {
+      items.push({
+        label: options.labels.hideIdenticalColumns,
+        action: options.actions.hideIdenticalColumns,
+        disabled: options.canHideIdenticalColumns === false,
+      });
+    }
     if ((options.hiddenColumnCount ?? 0) > 0) {
       items.push({ label: options.labels.showAllColumnsMenu, action: options.actions.showAllColumnsMenu });
     }
@@ -153,6 +162,16 @@ export function createDataGridColumnContextMenuItems(options: {
     }
     if (options.labels.freezeCurrentColumn && options.actions.freezeCurrentColumn) items.push({ label: options.labels.freezeCurrentColumn, action: options.actions.freezeCurrentColumn });
     items.push({ label: options.labels.freezeToColumn, action: options.actions.freezeToColumn });
+  } else if (options.labels.hideIdenticalColumns && options.actions.hideIdenticalColumns) {
+    items.push({ label: "", separator: true });
+    items.push({
+      label: options.labels.hideIdenticalColumns,
+      action: options.actions.hideIdenticalColumns,
+      disabled: options.canHideIdenticalColumns === false,
+    });
+    if ((options.hiddenColumnCount ?? 0) > 0) {
+      items.push({ label: options.labels.showAllColumnsMenu, action: options.actions.showAllColumnsMenu });
+    }
   }
   return items;
 }
diff --git a/packages/app-tests/dataGridColumnVisibility.test.ts b/packages/app-tests/dataGridColumnVisibility.test.ts
index 336d9a1080..55993efca5 100644
--- a/packages/app-tests/dataGridColumnVisibility.test.ts
+++ b/packages/app-tests/dataGridColumnVisibility.test.ts
@@ -3,11 +3,13 @@ import { test } from "vitest";
 import { buildDataGridColumnLookupItems, filterDataGridColumnLookupItems } from "../../apps/desktop/src/lib/dataGrid/dataGridColumnLookup.ts";
 import {
   allNullColumnIndexes,
+  areCellValuesEqual,
   filterColumnVisibilityOptions,
   hiddenColumnIndexesAfterHiding,
   hiddenColumnIndexesForKeys,
   hiddenColumnIndexesWithAllNullColumns,
   hiddenColumnKeysForIndexes,
+  identicalValueColumnIndexes,
   invertedHiddenColumnIndexes,
   nextHiddenColumnIndexes,
   removeAutoHiddenColumnIndexes,
@@ -212,3 +214,69 @@ test("keeps one all-null column visible when every column is NULL", () => {
   assert.deepEqual([...result.hiddenIndexes].sort(), [1, 2]);
   assert.deepEqual([...result.autoHiddenIndexes].sort(), [1, 2]);
 });
+
+test("compares cell values for equality correctly", () => {
+  assert.equal(areCellValuesEqual(1, 1), true);
+  assert.equal(areCellValuesEqual(1, 2), false);
+  assert.equal(areCellValuesEqual("a", "a"), true);
+  assert.equal(areCellValuesEqual("a", "b"), false);
+  assert.equal(areCellValuesEqual(null, null), true);
+  assert.equal(areCellValuesEqual(undefined, undefined), true);
+  assert.equal(areCellValuesEqual(null, undefined), false);
+  assert.equal(areCellValuesEqual(null, ""), false);
+  assert.equal(areCellValuesEqual(Number.NaN, Number.NaN), true);
+  assert.equal(areCellValuesEqual(new Date("2026-01-01"), new Date("2026-01-01")), true);
+  assert.equal(areCellValuesEqual(new Date("2026-01-01"), new Date("2026-01-02")), false);
+  assert.equal(areCellValuesEqual({ a: 1 }, { a: 1 }), true);
+  assert.equal(areCellValuesEqual({ a: 1 }, { a: 2 }), false);
+  assert.equal(areCellValuesEqual([1, 2], [1, 2]), true);
+  assert.equal(areCellValuesEqual([1, 2], [1, 3]), false);
+  assert.equal(areCellValuesEqual(new Uint8Array([1, 2]), new Uint8Array([1, 2])), true);
+  assert.equal(areCellValuesEqual(new Uint8Array([1, 2]), new Uint8Array([1, 3])), false);
+});
+
+test("finds columns where all rows have identical values", () => {
+  const rows = [
+    [1, "status_ok", "same", 100],
+    [2, "status_ok", "diff", 100],
+    [3, "status_ok", "diff2", 100],
+  ];
+
+  const identical = identicalValueColumnIndexes(rows, [0, 1, 2, 3]);
+  assert.deepEqual(identical, [1, 3]);
+});
+
+test("returns empty array when fewer than 2 rows exist", () => {
+  assert.deepEqual(identicalValueColumnIndexes([], [0, 1]), []);
+  assert.deepEqual(identicalValueColumnIndexes([[1, "a"]], [0, 1]), []);
+});
+
+test("returns empty array when candidate indexes is empty", () => {
+  assert.deepEqual(identicalValueColumnIndexes([[1, 2], [1, 2]], []), []);
+});
+
+test("returns empty array when no columns have identical values", () => {
+  const rows = [
+    [1, "a"],
+    [2, "b"],
+  ];
+  assert.deepEqual(identicalValueColumnIndexes(rows, [0, 1]), []);
+});
+
+test("detects identical values by original index when middle column is hidden", () => {
+  // 行保持全宽、候选是原始列索引（模拟第 1 列被隐藏后只剩 [0, 2, 3] 可见）
+  const rows = [
+    [1, "hidden_a", "same", 100],
+    [2, "hidden_b", "same", 101],
+    [3, "hidden_c", "same", 102],
+  ];
+  assert.deepEqual(identicalValueColumnIndexes(rows, [0, 2, 3]), [2]);
+});
+
+test("identifies identical columns with null and json objects", () => {
+  const rows = [
+    [null, { k: 1 }, "x"],
+    [null, { k: 1 }, "y"],
+  ];
+  assert.deepEqual(identicalValueColumnIndexes(rows, [0, 1, 2]), [0, 1]);
+});
diff --git a/packages/app-tests/dataGridContextMenu.test.ts b/packages/app-tests/dataGridContextMenu.test.ts
index 2c12c1d3ca..ead1111198 100644
--- a/packages/app-tests/dataGridContextMenu.test.ts
+++ b/packages/app-tests/dataGridContextMenu.test.ts
@@ -14,6 +14,13 @@ test("set NULL applies a real null value only to editable selections", () => {
   assert.doesNotMatch(handler, /fillSelectionWithValue\(["'](?:NULL)?["']\)/);
 });
 
+test("hide identical columns compares full-width rows, not visibility-projected ones", () => {
+  const fn = dataGridSource.match(/function getComparisonRows\(\)[^{]*\{[^]*?\n\}/)?.[0] ?? "";
+  assert.ok(fn, "getComparisonRows not found");
+  assert.match(fn, /\bdisplayItems\.value/);
+  assert.doesNotMatch(fn, /visibleDisplayItems/);
+});
+
 test("editable cell selections expose generation after bulk edit", () => {
   const icon = {};
   const action = () => {};