diff --git a/components/modal/style/index.less b/components/modal/style/index.less
index 0a777fbe..2171748c 100644
--- a/components/modal/style/index.less
+++ b/components/modal/style/index.less
@@ -166,7 +166,7 @@
 
     &-mask-fade-leave-active,
     &-mask-fade-enter-active {
-        transition: all 1s @ease-base-in;
+        transition: opacity @animation-duration-slow @ease-base-in;
     }
 
     &-mask-fade-leave-to,
@@ -176,7 +176,7 @@
 
     &-fade-leave-active,
     &-fade-enter-active {
-        transition: all 1s @ease-base-out;
+        transition: all @animation-duration-slow @ease-base-out;
     }
 
     &-fade-leave-to,