diff --git a/common/changes/@visactor/vtable/1778-bug-tree-mode-with-rowhierarchytextstartalignment-computcolwidth-error_2024-05-23-11-35.json b/common/changes/@visactor/vtable/1778-bug-tree-mode-with-rowhierarchytextstartalignment-computcolwidth-error_2024-05-23-11-35.json
new file mode 100644
index 000000000..06bf0fb59
--- /dev/null
+++ b/common/changes/@visactor/vtable/1778-bug-tree-mode-with-rowhierarchytextstartalignment-computcolwidth-error_2024-05-23-11-35.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "fix: first col tree mode compute col width error #1778\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/src/scenegraph/layout/compute-col-width.ts b/packages/vtable/src/scenegraph/layout/compute-col-width.ts
index 334db9872..070d2157f 100644
--- a/packages/vtable/src/scenegraph/layout/compute-col-width.ts
+++ b/packages/vtable/src/scenegraph/layout/compute-col-width.ts
@@ -363,7 +363,7 @@ function computeAutoColWidth(
       if ((hd as HeaderData)?.define?.columnWidthComputeMode === 'only-body') {
         continue;
       }
-      if ((hd as HeaderData)?.hierarchyLevel) {
+      if (isValid((hd as HeaderData)?.hierarchyLevel)) {
         cellHierarchyIndent =
           ((hd as HeaderData).hierarchyLevel ?? 0) * ((layoutMap as PivotHeaderLayoutMap).rowHierarchyIndent ?? 0);
         if (