diff --git a/jero-web/src/views/documentTools/searchCenter/components/problemKnowledgeBase.vue b/jero-web/src/views/documentTools/searchCenter/components/problemKnowledgeBase.vue
index 0df134b63..c0644dbab 100644
--- a/jero-web/src/views/documentTools/searchCenter/components/problemKnowledgeBase.vue
+++ b/jero-web/src/views/documentTools/searchCenter/components/problemKnowledgeBase.vue
@@ -7,6 +7,7 @@
             <span class="text-sel" :title="$t('problemClassification')">{{$t('problemClassification')}}</span>
             <a-select :placeholder="$t('PleaseSelect')+$t('problemClassification')"
                       class="text-select"
+                      mode="multiple"
                       :getPopupContainer="triggerNode=> triggerNode.parentNode"
                       allowClear
                       v-model="queryParamOne.problem_type">