diff --git a/common/changes/@visactor/vchart/develop_2026-03-11-03-30.json b/common/changes/@visactor/vchart/develop_2026-03-11-03-30.json
new file mode 100644
index 0000000000..5f5bc535a7
--- /dev/null
+++ b/common/changes/@visactor/vchart/develop_2026-03-11-03-30.json
@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "fix: fix theme config of spec and option\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/core/vchart.ts b/packages/vchart/src/core/vchart.ts
index b337bf670d..a43fd728fb 100644
--- a/packages/vchart/src/core/vchart.ts
+++ b/packages/vchart/src/core/vchart.ts
@@ -1471,27 +1471,19 @@ export class VChart implements IVChart {
     // 处理 specTheme 和 optionTheme, merge -> transform
     // 优先级 currentTheme < optionTheme < specTheme
     if (!isEmpty(optionTheme) || !isEmpty(specTheme)) {
-      if (
-        (isString(optionTheme) && (!specTheme || isString(specTheme))) ||
-        (isString(specTheme) && (!optionTheme || isString(optionTheme)))
-      ) {
-        const finalTheme = mergeTheme(
-          {},
-          getThemeObject(this._currentThemeName),
-          getThemeObject(optionTheme),
-          getThemeObject(specTheme)
-        );
-
-        this._currentTheme = processThemeByChartType(chartType, finalTheme);
-      } else {
-        const finalTheme = mergeTheme(
-          {},
-          getThemeObject(this._currentThemeName),
-          getThemeObject(optionTheme),
-          getThemeObject(specTheme)
-        );
-        this._currentTheme = processThemeByChartType(chartType, finalTheme);
-      }
+      const finalTheme = mergeTheme(
+        {},
+        getThemeObject(
+          isObject(specTheme) && specTheme.type
+            ? specTheme.type
+            : isObject(optionTheme) && optionTheme.type
+            ? optionTheme.type
+            : this._currentThemeName
+        ),
+        getThemeObject(optionTheme),
+        getThemeObject(specTheme)
+      );
+      this._currentTheme = processThemeByChartType(chartType, finalTheme);
     } else {
       currentTheme = getThemeObject(this._currentThemeName);
       this._currentTheme = processThemeByChartType(chartType, currentTheme);