diff --git a/packages/vant-css/src/toast.css b/packages/vant-css/src/toast.css
index e39dc8bb3..c5525ed13 100644
--- a/packages/vant-css/src/toast.css
+++ b/packages/vant-css/src/toast.css
@@ -10,6 +10,7 @@
   font-size: 12px;
   line-height: 1.2;
   border-radius: 5px;
+  word-break: break-all;
   align-items: center;
   justify-content: center;
   flex-direction: column;