diff --git a/common/changes/@visactor/vtable/3348-bug-vtable-gantt-updateScale_2025-01-26-09-55.json b/common/changes/@visactor/vtable/3348-bug-vtable-gantt-updateScale_2025-01-26-09-55.json
new file mode 100644
index 000000000..0a9d1f7ee
--- /dev/null
+++ b/common/changes/@visactor/vtable/3348-bug-vtable-gantt-updateScale_2025-01-26-09-55.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "fix: updateScales to quarter taskbar size error #3348\n\n",
+      "type": "none",
+      "packageName": "@visactor/vtable"
+    }
+  ],
+  "packageName": "@visactor/vtable",
+  "email": "892739385@qq.com"
+}
\ No newline at end of file
diff --git a/packages/vtable-gantt/src/tools/util.ts b/packages/vtable-gantt/src/tools/util.ts
index c517ebdb2..67955bb1e 100644
--- a/packages/vtable-gantt/src/tools/util.ts
+++ b/packages/vtable-gantt/src/tools/util.ts
@@ -1,4 +1,5 @@
 import { isValid } from '@visactor/vutils';
+import { DayTimes } from '../gantt-helper';
 
 /**
  * throttle 保障了首次立即执行 后续触发的回调执行间隔delay时间 区别于throttle2 最后执行时机会提前
@@ -706,7 +707,8 @@ export function computeCountToTimeScale(
         Math.floor(adjusted_date.getMonth() / 3) -
         Math.floor(startDate.getMonth() / 3);
       difference +=
-        (adjusted_date.getDate() - startDate.getDate()) /
+        (adjusted_date.getTime() - startDate.getTime()) /
+        DayTimes /
         (3 * new Date(adjusted_date.getFullYear(), adjusted_date.getMonth() + 1, 0).getDate());
       break;
     case 'year':