diff --git a/common/changes/@visactor/vtable/fix-large-merge-autoHeight_2025-04-21-09-39.json b/common/changes/@visactor/vtable/fix-large-merge-autoHeight_2025-04-21-09-39.json
new file mode 100644
index 0000000000..66f8a119d1
--- /dev/null
+++ b/common/changes/@visactor/vtable/fix-large-merge-autoHeight_2025-04-21-09-39.json
@@ -0,0 +1,10 @@
+{
+  "changes": [
+    {
+      "packageName": "@visactor/vtable",
+      "comment": "fix: fix merge cell autoHeight #3752",
+      "type": "none"
+    }
+  ],
+  "packageName": "@visactor/vtable"
+}
\ No newline at end of file
diff --git a/packages/vtable/src/scenegraph/layout/compute-row-height.ts b/packages/vtable/src/scenegraph/layout/compute-row-height.ts
index 27dc00c478..ac5f2e52f6 100644
--- a/packages/vtable/src/scenegraph/layout/compute-row-height.ts
+++ b/packages/vtable/src/scenegraph/layout/compute-row-height.ts
@@ -639,8 +639,9 @@ function computeCustomRenderHeight(col: number, row: number, table: BaseTableAPI
       const padding = getQuadProps(getProp('padding', actStyle, col, row, table));
       height += padding[0] + padding[2];
     }
+    const minSingleRowHeight = table.options.customConfig?.minSingleRowHeight ?? 2;
     return {
-      height: height / spanRow,
+      height: Math.max(height / spanRow, minSingleRowHeight),
       renderDefault
     };
   }
@@ -880,7 +881,8 @@ function computeTextHeight(col: number, row: number, cellType: ColumnTypeOption,
       }
     }
   }
-  return (Math.max(maxHeight, iconHeight) + padding[0] + padding[2]) / spanRow;
+  const minSingleRowHeight = table.options.customConfig?.minSingleRowHeight ?? 2;
+  return Math.max((Math.max(maxHeight, iconHeight) + padding[0] + padding[2]) / spanRow, minSingleRowHeight);
 }
 
 function getCellRect(col: number, row: number, table: BaseTableAPI) {
diff --git a/packages/vtable/src/scenegraph/stick-text/index.ts b/packages/vtable/src/scenegraph/stick-text/index.ts
index 3c09560f7a..e152931819 100644
--- a/packages/vtable/src/scenegraph/stick-text/index.ts
+++ b/packages/vtable/src/scenegraph/stick-text/index.ts
@@ -45,6 +45,9 @@ export function handleTextStick(table: BaseTableAPI) {
     return;
   }
 
+  const horizontalUpdateTimeStamp = Date.now();
+  const verticalUpdateTimeStamp = Date.now();
+
   // column header
   for (let row = 0; row < frozenRowCount; row++) {
     if (colEnd < colStart) {
@@ -61,7 +64,8 @@ export function handleTextStick(table: BaseTableAPI) {
           table.tableNoFrameWidth - table.getRightFrozenColsWidth() + table.tableX,
           changedCells,
           style?.textStickBaseOnAlign,
-          table
+          table,
+          horizontalUpdateTimeStamp
         );
       }
     });
@@ -87,7 +91,8 @@ export function handleTextStick(table: BaseTableAPI) {
           table.tableNoFrameHeight - table.getBottomFrozenRowsHeight() + table.tableY,
           changedCells,
           style?.textStickBaseOnAlign,
-          table
+          table,
+          verticalUpdateTimeStamp
         );
       }
     });
@@ -109,7 +114,8 @@ export function handleTextStick(table: BaseTableAPI) {
           table.tableNoFrameHeight - table.getBottomFrozenRowsHeight() + table.tableY,
           changedCells,
           style?.textStickBaseOnAlign,
-          table
+          table,
+          verticalUpdateTimeStamp
         );
       }
     });
@@ -129,7 +135,8 @@ export function handleTextStick(table: BaseTableAPI) {
           table.tableNoFrameWidth - table.getRightFrozenColsWidth() + table.tableX,
           changedCells,
           style?.textStickBaseOnAlign,
-          table
+          table,
+          horizontalUpdateTimeStamp
         );
       }
     });
@@ -147,7 +154,8 @@ function adjustCellContentVerticalLayout(
   maxTop: number,
   changedCells: Map<string, StickCell>,
   textStickBaseOnAlign: boolean | undefined,
-  table: BaseTableAPI
+  table: BaseTableAPI,
+  updateTimeStamp: number
 ) {
   if (
     isNumber(cellGroup.mergeStartCol) &&
@@ -158,11 +166,17 @@ function adjustCellContentVerticalLayout(
     const { colStart, colEnd, rowStart, rowEnd } = getCellMergeRange(cellGroup, table.scenegraph);
     for (let col = colStart; col <= colEnd; col++) {
       for (let row = rowStart; row <= rowEnd; row++) {
-        const singleCellGroup = table.scenegraph.getCell(col, row);
+        const singleCellGroup = table.scenegraph.highPerformanceGetCell(col, row);
         if (singleCellGroup.role !== 'cell') {
           continue;
         }
-        dealVertical(singleCellGroup, minTop, maxTop, changedCells, textStickBaseOnAlign);
+        if ((singleCellGroup as any).updateTimeStamp !== updateTimeStamp) {
+          dealVertical(singleCellGroup, minTop, maxTop, changedCells, textStickBaseOnAlign);
+          (singleCellGroup as any).updateTimeStamp = updateTimeStamp;
+        } else {
+          // do nothing
+          // console.log('ignore');
+        }
       }
     }
   } else {
@@ -260,7 +274,8 @@ function adjustCellContentHorizontalLayout(
   maxLeft: number,
   changedCells: Map<string, StickCell>,
   textStickBaseOnAlign: boolean | undefined,
-  table: BaseTableAPI
+  table: BaseTableAPI,
+  updateTimeStamp: number
 ) {
   if (
     isNumber(cellGroup.mergeStartCol) &&
@@ -275,7 +290,13 @@ function adjustCellContentHorizontalLayout(
         if (singleCellGroup.role !== 'cell') {
           continue;
         }
-        dealHorizontal(singleCellGroup, minLeft, maxLeft, changedCells, textStickBaseOnAlign);
+        if ((singleCellGroup as any).updateTimeStamp !== updateTimeStamp) {
+          dealHorizontal(singleCellGroup, minLeft, maxLeft, changedCells, textStickBaseOnAlign);
+          (singleCellGroup as any).updateTimeStamp = updateTimeStamp;
+        } else {
+          // do nothing
+          // console.log('ignore');
+        }
       }
     }
   } else {
diff --git a/packages/vtable/src/ts-types/base-table.ts b/packages/vtable/src/ts-types/base-table.ts
index 5802c9e5ef..0bf44d7939 100644
--- a/packages/vtable/src/ts-types/base-table.ts
+++ b/packages/vtable/src/ts-types/base-table.ts
@@ -573,6 +573,9 @@ export interface BaseTableConstructorOptions {
 
     // 是否禁用内置图表激活
     disableBuildInChartActive?: boolean;
+
+    // 多行合并行号自动计算时单行最小行高，用在大量行合并的情况下，行高自动计算过小导致无法显示完整内容
+    minSingleRowHeight?: number;
   }; // 部分特殊配置，兼容xTable等作用
 
   animationAppear?: boolean | IAnimationAppear;