diff --git a/src/App.tsx b/src/App.tsx
index 3b0236a..39fe608 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -968,6 +968,7 @@ function App() {
     },
     [chartSummaryBySelection, selectedContentNodes],
   );
+  const pivotGridSampleCount = pivotGridPinnedBottomRowData[0]?.dataCount ?? 0;
   const pivotGridColumnDefs = useMemo<(ColDef<PivotGridRow> | ColGroupDef<PivotGridRow>)[]>(
     () => {
       const valueFormatter = ({ value }: ValueFormatterParams<PivotGridRow, number | null>) => (
@@ -1015,7 +1016,7 @@ function App() {
           ],
         },
         {
-          headerName: `样本统计值（${pivotGridRowData.length}）`,
+          headerName: `样本统计值（${formatNumber(pivotGridSampleCount, 0)}）`,
           children: [
             {
               field: 'maxValue',
@@ -1072,7 +1073,7 @@ function App() {
         },
       ];
     },
-    [pivotGridRowData.length, requestMetricKey],
+    [pivotGridSampleCount, requestMetricKey],
   );
   const fitPivotGridColumns = useCallback(() => {
     window.requestAnimationFrame(() => {