diff --git a/packages/react-tooltip/src/style/index.less b/packages/react-tooltip/src/style/index.less
index 69e3dfeb47..f78f91f208 100644
--- a/packages/react-tooltip/src/style/index.less
+++ b/packages/react-tooltip/src/style/index.less
@@ -22,6 +22,7 @@
     background-color: @tooltip-bg;
     border-radius: 4px;
     box-shadow: 0 1px 6px rgba(0, 0, 0, 0.2);
+    word-break: break-all; 
   }
 
   &.right &-arrow,