diff --git a/components/drawer/style/drawer.less b/components/drawer/style/drawer.less
index 800bd4fae8b3..9f7dd1846fb4 100644
--- a/components/drawer/style/drawer.less
+++ b/components/drawer/style/drawer.less
@@ -130,6 +130,7 @@
   }
 
   &-title {
+    flex: 1;
     margin: 0;
     color: @heading-color;
     font-weight: 500;
@@ -184,6 +185,7 @@
 
     &-title {
       display: flex;
+      flex: 1;
       align-items: center;
       justify-content: space-between;
     }