diff --git a/src/components/BpmnDesign/index.vue b/src/components/BpmnDesign/index.vue
index abc4c08..ca96c81 100644
--- a/src/components/BpmnDesign/index.vue
+++ b/src/components/BpmnDesign/index.vue
@@ -390,7 +390,8 @@ pre {
   border-left: 1px solid #eeeeee;
   box-shadow: #cccccc 0 0 8px;
   max-height: 100%;
-  width: 480px;
+  width: 25%;
+  min-width: 200px;
   height: calc(100vh - 80px);
   :deep(.el-collapse) {
     height: calc(100vh - 162px);