diff --git a/packages/theme-chalk/src/common/var.scss b/packages/theme-chalk/src/common/var.scss
index 8d21441e4b..84db3aa593 100644
--- a/packages/theme-chalk/src/common/var.scss
+++ b/packages/theme-chalk/src/common/var.scss
@@ -634,6 +634,7 @@ $--popover-padding-large: 18px 20px !default;
 $--popover-title-font-size: 16px !default;
 /// color||Color|0
 $--popover-title-font-color: $--color-text-primary !default;
+$--popover-border-radius: 4px !default;
 
 /* Tooltip
 -------------------------- */
diff --git a/packages/theme-chalk/src/popover.scss b/packages/theme-chalk/src/popover.scss
index d680572f4f..e205a9506a 100644
--- a/packages/theme-chalk/src/popover.scss
+++ b/packages/theme-chalk/src/popover.scss
@@ -6,7 +6,7 @@
   &.#{$namespace}-popper {
     background: $--popover-background-color;
     min-width: 150px;
-    border-radius: 4px;
+    border-radius: $--popover-border-radius;
     border: 1px solid $--popover-border-color;
     padding: $--popover-padding;
     z-index: $--index-popper;
diff --git a/packages/theme-chalk/src/popper.scss b/packages/theme-chalk/src/popper.scss
index e3c85eb254..257f76a3bf 100644
--- a/packages/theme-chalk/src/popper.scss
+++ b/packages/theme-chalk/src/popper.scss
@@ -3,7 +3,7 @@
 
 @include b(popper) {
   position: absolute;
-  border-radius: 4px;
+  border-radius: $--popover-border-radius;
   padding: 10px;
   z-index: 2000;
   font-size: 12px;