diff --git a/common/changes/@visactor/vchart/fix-heatmap-label_2025-12-26-08-38.json b/common/changes/@visactor/vchart/fix-heatmap-label_2025-12-26-08-38.json
new file mode 100644
index 0000000000..13ba46254f
--- /dev/null
+++ b/common/changes/@visactor/vchart/fix-heatmap-label_2025-12-26-08-38.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "fix: fix default lineWidth for heatmap label\n\n",
+      "type": "none",
+      "packageName": "@visactor/vchart"
+    }
+  ],
+  "packageName": "@visactor/vchart",
+  "email": "dingling112@gmail.com"
+}
\ No newline at end of file
diff --git a/packages/vchart/src/series/heatmap/heatmap.ts b/packages/vchart/src/series/heatmap/heatmap.ts
index 3ad2f3d783..7467526fb9 100644
--- a/packages/vchart/src/series/heatmap/heatmap.ts
+++ b/packages/vchart/src/series/heatmap/heatmap.ts
@@ -73,7 +73,7 @@ export class HeatmapSeries<T extends IHeatmapSeriesSpec = IHeatmapSeriesSpec> ex
       return;
     }
     this.setMarkStyle(textMark, {
-      fill: this.getColorAttribute(),
+      fill: this._spec.cell?.style?.fill ?? this.getColorAttribute(),
       text: (datum: Datum) => {
         return datum[this.getMeasureField()[0]];
       }
diff --git a/packages/vchart/src/theme/builtin/common/series/heatmap.ts b/packages/vchart/src/theme/builtin/common/series/heatmap.ts
index 6697536abf..460e324640 100644
--- a/packages/vchart/src/theme/builtin/common/series/heatmap.ts
+++ b/packages/vchart/src/theme/builtin/common/series/heatmap.ts
@@ -9,5 +9,10 @@ export const heatmap: IHeatmapSeriesTheme = {
   },
   cellBackground: {
     visible: false
+  },
+  label: {
+    style: {
+      lineWidth: 2
+    }
   }
 };