diff --git a/src/assets/less/Suless.less b/src/assets/less/Suless.less
index d2a4581..6aa8af1 100644
--- a/src/assets/less/Suless.less
+++ b/src/assets/less/Suless.less
@@ -112,7 +112,7 @@ body {
 }
 
 .ant-select-selection--multiple .ant-select-selection__choice {
-  background-color: #3f4354 !important;
+  background-color: #ffffff !important;
   border: 1px solid #3f4354 !important;
 }
 
@@ -623,11 +623,12 @@ textarea,
 .ant-input-number-handler-down-inner,
 .ant-select-tree-dropdown,
 .ant-select-dropdown-menu-item,
-.ant-select-dropdown-menu-item-selected,
-.ant-select-dropdown-content {
+.ant-select-dropdown-menu-item-selected {
   background: @inpuitbackcolor !important;
 }
-
+.ant-select-dropdown-content {
+  background: @backcolor !important;
+}
 .ant-popover-message,
 input:not(.ant-calendar-input):not(.ant-select-search__field):not(.ant-input-lg),
 textarea,
diff --git a/src/views/datawashing/dataformatsRules/rulesModel.vue b/src/views/datawashing/dataformatsRules/rulesModel.vue
index b3892ad..cd64131 100644
--- a/src/views/datawashing/dataformatsRules/rulesModel.vue
+++ b/src/views/datawashing/dataformatsRules/rulesModel.vue
@@ -9,7 +9,8 @@
                 </a-form-model-item>
                 <a-form-model-item label="转换字段" :labelCol="labelCol" :wrapperCol="wrapperCol" >
                     <a-tree-select v-model="checkedList" style="width: 100%"
-                        :tree-data="treeData" multiple :show-checked-strategy="SHOW_PARENT" search-placeholder="请选项" />
+                        :tree-data="treeData" multiple :show-checked-strategy="SHOW_PARENT" search-placeholder="请选项" 
+                        :dropdownStyle="{ maxHeight: '400px', overflowY: 'auto'}"/>
                 </a-form-model-item>
                 <a-form-model-item label="格式策略" :labelCol="labelCol" :wrapperCol="wrapperCol" prop="transfStrategy">
                     <a-select v-model="form.transfStrategy">
diff --git a/src/views/datawashing/datatypeConversionRules/rulesModel.vue b/src/views/datawashing/datatypeConversionRules/rulesModel.vue
index b921059..f85e687 100644
--- a/src/views/datawashing/datatypeConversionRules/rulesModel.vue
+++ b/src/views/datawashing/datatypeConversionRules/rulesModel.vue
@@ -9,7 +9,8 @@
                 </a-form-model-item>
                 <a-form-model-item label="列名" :labelCol="labelCol" :wrapperCol="wrapperCol" prop="columnName">
                     <a-tree-select v-model="form.columnName" style="width: 100%"
-                        :tree-data="treeData" :show-checked-strategy="SHOW_PARENT" search-placeholder="请选项" />
+                        :tree-data="treeData" :show-checked-strategy="SHOW_PARENT" search-placeholder="请选项" 
+                        :dropdownStyle="{ maxHeight: '400px', overflowY: 'auto'}"/>
                 </a-form-model-item>
                 <a-form-model-item label="数据类型" :labelCol="labelCol" :wrapperCol="wrapperCol" prop="dataType">
                     <a-select v-model="form.dataType">
diff --git a/src/views/datawashing/deEmphasisRules/modules/rulesModel.vue b/src/views/datawashing/deEmphasisRules/modules/rulesModel.vue
index 41b13e5..2c06586 100644
--- a/src/views/datawashing/deEmphasisRules/modules/rulesModel.vue
+++ b/src/views/datawashing/deEmphasisRules/modules/rulesModel.vue
@@ -20,7 +20,8 @@
                 <a-form-model-item label="判定字段" :labelCol="labelCol" :wrapperCol="wrapperCol">
                     <a-input v-if="form.duplicationType == 1" disabled v-model="allText" placeholder="请输入"></a-input>
                     <a-tree-select v-if="form.duplicationType == 2" v-model="checkedList" style="width: 100%"
-                        :tree-data="treeData" multiple :show-checked-strategy="SHOW_PARENT" search-placeholder="请选项" />
+                        :tree-data="treeData" multiple :show-checked-strategy="SHOW_PARENT" search-placeholder="请选项" 
+                        :dropdownStyle="{ maxHeight: '400px', overflowY: 'auto'}"/>
 
                 </a-form-model-item>
             </a-form-model>