diff --git a/frontend/src/components/canvas/utils/style.js b/frontend/src/components/canvas/utils/style.js
index 448ac7e418..b7cc3dd182 100644
--- a/frontend/src/components/canvas/utils/style.js
+++ b/frontend/src/components/canvas/utils/style.js
@@ -346,14 +346,14 @@ export function adaptCurTheme(customStyle, customAttr, chartType) {
     recursionThemTransObj(THEME_ATTR_TRANS_SLAVE1_BACKGROUND, customAttr, LIGHT_THEME_COMPONENT_BACKGROUND)
     if (chartType === 'symbol-map') {
       // 符号地图特殊处理
-      Vue.set(customStyle['baseMapStyle'], 'baseMapTheme', 'light')
+      Vue.set(customStyle, 'baseMapStyle', { baseMapTheme: 'light' })
     }
   } else {
     recursionThemTransObj(THEME_STYLE_TRANS_MAIN, customStyle, DARK_THEME_COLOR_MAIN)
     recursionThemTransObj(THEME_STYLE_TRANS_SLAVE1, customStyle, DARK_THEME_COLOR_SLAVE1)
     if (chartType === 'symbol-map') {
       // 符号地图特殊处理
-      Vue.set(customStyle['baseMapStyle'], 'baseMapTheme', 'dark')
+      Vue.set(customStyle, 'baseMapStyle', { baseMapTheme: 'dark' })
       recursionThemTransObj(THEME_ATTR_TRANS_MAIN_SYMBOL, customAttr, '#000000')
     } else {
       recursionThemTransObj(THEME_ATTR_TRANS_MAIN, customAttr, DARK_THEME_COLOR_MAIN)