diff --git a/src/checkbox/style/index.less b/src/checkbox/style/index.less
index a021a2a2ee..f900b87161 100644
--- a/src/checkbox/style/index.less
+++ b/src/checkbox/style/index.less
@@ -107,6 +107,7 @@
         &::after {
           top: 0;
           left: 4px;
+          box-sizing: content-box;
           width: 5px;
           height: 9px;
           border: 1px solid var(--active-inner);