diff --git a/src/styles/components/modal.less b/src/styles/components/modal.less
index 1f22de41..fcf85868 100644
--- a/src/styles/components/modal.less
+++ b/src/styles/components/modal.less
@@ -128,6 +128,10 @@
         width: auto !important;
         margin: 10px;
     }
+    .@{modal-prefix-cls}-fullscreen{
+        width: 100% !important;
+        margin: 0;
+    }
     .vertical-center-modal {
         .@{modal-prefix-cls} {
             flex: 1;