diff --git a/src/components/signup/SignupModal.vue b/src/components/signup/SignupModal.vue
index 9b5f35e5..9ee4111a 100644
--- a/src/components/signup/SignupModal.vue
+++ b/src/components/signup/SignupModal.vue
@@ -104,7 +104,7 @@
               <div class="already">已选</div>
             </div>
           </div>
-          <div :style="{ 'max-height': screenHeight - 235 + 'px' }" style="overflow-y: auto">
+          <div class="selected-area" :style="{ 'max-height': screenHeight - 235 + 'px' }" style="overflow-y: auto">
             <div class="selecteds" v-if="infoType">
               <div class="person">项目内学员</div>
               <div v-for="(item, i) in projectSelectRows" :key="item.id || item.studentId">
@@ -596,8 +596,23 @@ export default {
 .right1 {
   border-left: 1px solid #f2f6fe;
   margin-left: 20px;
-  max-width: 200px;
-
+  width: 200px;
+  .selected-area {
+    &::-webkit-scrollbar-thumb {
+      border-radius: 4px;
+      background-color: #4284F7;
+    }
+    &::-webkit-scrollbar {
+      width: 6px;
+      height: 6px;
+      background-color:rgba(0, 0, 0, .1);
+      border-radius: 4px;
+    }
+    &::-webkit-scrollbar-thumb {
+      border-radius: 4px;
+      background-color: #4284F7
+    }
+  }
   .onerow {
     display: flex;
     justify-content: space-between;