diff --git a/src/pages/processCenter/pages/creatProcess/qbrk/step5.vue b/src/pages/processCenter/pages/creatProcess/qbrk/step5.vue
index de81523ab..137d0336a 100644
--- a/src/pages/processCenter/pages/creatProcess/qbrk/step5.vue
+++ b/src/pages/processCenter/pages/creatProcess/qbrk/step5.vue
@@ -490,6 +490,7 @@
                                 :label="item.name"
                                 :name="item.id"
                         >
+                            <loading :loading="iframeLoading">正在加载文档</loading>
                             <iframe width="100%" height="100%" wframeborder="0" ref="iframe" v-bind:src="iframeUrl"></iframe>
                         </el-tab-pane>
                     </el-tabs>
@@ -977,6 +978,7 @@
                         }
                     }]
                 },
+                iframeLoading:false,
                 iframeUrl:"",
                 showForm:{
                     modelNum: '',
@@ -1431,6 +1433,7 @@
         },
         methods: {
             previewShow(attId) {
+                this.iframeLoading = true
                 return new Promise((resolve, reject) => {
                     getBusStandFileByAttId({
                         attId
@@ -1447,6 +1450,7 @@
                                 // window.open(onlyOfficeUrl+'/onlyOffice?oldFileName=' + editFileInfo.oldFileName + '&fileType=' + editFileInfo.fileSuffix + '&attId=' + editFileInfo.id + '&fileUrl=' + editFileInfo.downLoadUrl + '&key=' + editFileInfo.id + nowTime+'&filePath='+editFileInfo.filePath+'&fileName='+editFileInfo.fileName)
                                 this.iframeUrl = kkFileViewUrl+'/onlinePreview?url='+encodeURIComponent(Base64.encode(editFileInfo.downLoadUrl));
                             }
+                            this.iframeLoading = false
                             this.$forceUpdate()
                             resolve(history)
                         }