diff --git a/components/alert/style/index.less b/components/alert/style/index.less
index 0aa408c811..0e189d096a 100644
--- a/components/alert/style/index.less
+++ b/components/alert/style/index.less
@@ -13,6 +13,7 @@
 
   position: relative;
   padding: 8px 15px 8px 37px;
+  word-wrap: break-word;
   border-radius: @border-radius-base;
 
   &&-no-icon {