diff --git a/src/utils/request-pool.js b/src/utils/request-pool.js
index 0807f01b..ec19d322 100644
--- a/src/utils/request-pool.js
+++ b/src/utils/request-pool.js
@@ -1,7 +1,7 @@
 import * as cornerstone from 'cornerstone-core'
 var taskPool = [] // 请求池
 let numRequest = 0 // 正在执行数量
-const maxRequest = 6 // 可配置
+const maxRequest = 5 // 可配置
 let taskTimer // 轮询的定时器
 var cachedTask = {} // 存放的任务数据
 let sortType = 1
@@ -10,9 +10,10 @@ let startExecuteTask = null
 let endExecuteTask = performance.now()
 // 执行下载
 async function executeTask() {
+  console.log(taskPool)
   endExecuteTask = performance.now()
   i++
-  // stopTaskTimer()
+  stopTaskTimer()
   if (taskPool.length > 0) {
     let startSortTime = performance.now()
     if( sortType ){
@@ -119,6 +120,14 @@ function removeTask(seriesId){
   }
   startTaskTimer()
 }
+function changePriority(seriesId){
+  taskPool.map(task=>{
+    if(task.seriesId === seriesId){
+      task.priority = parseInt(new Date().getTime()) * 10
+    }
+  })
+  sortTaskPool()
+}
 function setSortType(type){
   sortType = type
 }
@@ -147,6 +156,7 @@ export default {
   executeTask,
   setSortType,
   sortTaskPool,
+  changePriority,
   startTaskTimer,
   stopTaskTimer,
   loadAndCacheImagePlus,
diff --git a/src/views/dicom-show/dicom-study.vue b/src/views/dicom-show/dicom-study.vue
index cc8970d3..76ffae39 100644
--- a/src/views/dicom-show/dicom-study.vue
+++ b/src/views/dicom-show/dicom-study.vue
@@ -152,7 +152,8 @@ export default {
       firstInstanceId: '',
       showDelete: false,
       loading: false,
-      imageList: []
+      imageList: [],
+      showSeriesList: []
     }
   },
   created: function() {
@@ -307,17 +308,22 @@ export default {
       this.currentSeriesIndex = seriesIndex
       this.$refs.dicomViewer.loadImageStack(this.seriesList[seriesIndex])
       if (!series.loadStatus) {
-        series.isLoading = true
-        var p = new Date().getTime()
-        series.imageIds.map((imageId, i) => {
-          var priority = ''
-          if (i === 0) {
-            priority = new Date(new Date().setHours(23, 59, 59, 999)).getTime()
-          } else {
-            priority = p - 1
-          }
-          this.imageList.push({ imageId: imageId, seriesId: series.seriesId, priority })
-        })
+        requestPoolManager.changePriority(series.seriesId)
+        // var isAddToTakPool = false
+        // if (this.showSeriesList.includes(`${seriesIndex}`)) {
+        //   isAddToTakPool = true
+        // } else {
+        //   this.showSeriesList.push(`${seriesIndex}`)
+        // }
+        // if (!isAddToTakPool) {
+        //   var priority = parseInt(new Date().getTime())
+        //   series.isLoading = true
+        //   series.imageIds.map((imageId) => {
+        //     this.imageList.push({ imageId: imageId, seriesId: series.seriesId, priority })
+        //   })
+        // } else {
+        //   requestPoolManager.changePriority(series.seriesId)
+        // }
       }
     },
     initStudy() {
diff --git a/src/views/dicom-show/dicom-visit.vue b/src/views/dicom-show/dicom-visit.vue
index 85ee8aec..8ca4336c 100644
--- a/src/views/dicom-show/dicom-visit.vue
+++ b/src/views/dicom-show/dicom-visit.vue
@@ -233,7 +233,8 @@ export default {
       showDelete: 0,
       imageList: [],
       activeNames: [],
-      relationActiveName: []
+      relationActiveName: [],
+      showSeriesList: []
     }
   },
   mounted() {
@@ -323,18 +324,22 @@ export default {
       this.currentSeriesIndex = seriesIndex
       this.$refs.dicomViewer.loadImageStack(this.studyList[studyIndex].SeriesList[seriesIndex])
       if (!series.loadStatus) {
-        series.isLoading = true
-        var p = parseInt(new Date().getTime())
-        series.imageIds.map((imageId, i) => {
-          var priority = ''
-          if (i === 0) {
-            priority = parseInt(new Date().getTime()) * 10
-          } else {
-            priority = p - 1
-          }
-          this.imageList.push({ imageId: imageId, seriesId: series.seriesId, priority })
-          // this.load(imageId, series.seriesId, priority)
-        })
+        requestPoolManager.changePriority(series.seriesId)
+        // var isAddToTakPool = false
+        // if (this.showSeriesList.includes(`${studyIndex}_${seriesIndex}`)) {
+        //   isAddToTakPool = true
+        // } else {
+        //   this.showSeriesList.push(`${studyIndex}_${seriesIndex}`)
+        // }
+        // if (!isAddToTakPool) {
+        //   var priority = parseInt(new Date().getTime())
+        //   series.isLoading = true
+        //   series.imageIds.map((imageId, i) => {
+        //     this.imageList.push({ imageId: imageId, seriesId: series.seriesId, priority })
+        //   })
+        // } else {
+        //   requestPoolManager.changePriority(series.seriesId)
+        // }
       }
     },
     changeReadingStatus(callback, data) {
@@ -515,7 +520,7 @@ export default {
             this.imageLoaded(image, res.data.string('x0020000e'))
           })
         })
-
+        requestPoolManager.sortTaskPool()
         this.imageList = []
       }
     },
diff --git a/src/views/trials/trials-panel/reading/dicoms/components/StudyList.vue b/src/views/trials/trials-panel/reading/dicoms/components/StudyList.vue
index 60ab27b9..833696ac 100644
--- a/src/views/trials/trials-panel/reading/dicoms/components/StudyList.vue
+++ b/src/views/trials/trials-panel/reading/dicoms/components/StudyList.vue
@@ -170,6 +170,7 @@ export default {
     return {
       studyList: [],
       cachedImages: [],
+      showSeriesList: [],
       studyIndex: null,
       seriesIndex: null,
       loading: false,
@@ -228,11 +229,12 @@ export default {
     // cornerstone.events.addEventListener('cornerstoneimagecachechanged', this.cornerstoneimagecachechanged)
   },
   beforeDestroy() {
+    console.log('study---beforeDestroy')
     cornerstone.imageCache.purgeCache()
     DicomEvent.$off('refreshStudyListMeasureData')
   },
   methods: {
-    initStudyInfo(){
+    initStudyInfo() {
       const loading = this.$loading({ fullscreen: true })
       // 初始化待渲染序列
       this.getInitSeries().then((res) => {
@@ -243,18 +245,16 @@ export default {
         console.log(res)
         var i = res.findIndex(s => s.isCurrentTask)
         if (i > -1) {
-         
           var idx = this.visitTaskList.findIndex(i => i.VisitTaskId === this.visitTaskId)
           if (idx > -1) {
             this.measureData = this.visitTaskList[idx].MeasureData
             this.studyList = this.visitTaskList[idx].StudyList
-            var priority = parseInt(new Date().getTime()) * 10
-            res[i].imageIds.map(image=>{
-              priority --
+            var priority = parseInt(new Date().getTime())
+            res[i].imageIds.map(image => {
+              priority--
               this.imageList.push({ imageId: image, seriesId: res[i].seriesId, studyIndex: res[i].studyIndex, seriesIndex: res[i].seriesIndex, visitTaskId: res[i].visitTaskId, priority })
             })
 
-
             // this.studyList.map((study, studyIndex) => {
             //   study.SeriesList.map((series, seriesIndex) => {
             //     if (series.modality !== 'SR') {
@@ -605,19 +605,23 @@ export default {
           if (!series.loadStatus && series.modality !== 'SR') {
             this.loopLoadStatus = -1
             series.isLoading = true
-            var p = parseInt(new Date().getTime())
-            series.imageIds.map((imageId, i) => {
-              var priority = ''
-              if (i === 0) {
-                priority = parseInt(new Date().getTime()) * 10
-              } else {
-                priority = --p
+            var isAddToTakPool = false
+            if (this.showSeriesList.includes(`${studyIndex}_${seriesIndex}`)) {
+              isAddToTakPool = true
+            } else {
+              this.showSeriesList.push(`${studyIndex}_${seriesIndex}`)
+            }
+            if (!isAddToTakPool) {
+              var priority = parseInt(new Date().getTime())
+              series.imageIds.map((imageId) => {
+                this.imageList.push({ imageId: imageId, seriesId: series.seriesId, studyIndex: studyIndex, seriesIndex: seriesIndex, visitTaskId: series.visitTaskId, priority })
+              })
+              if (this.imageList.length > 0) {
+                this.loopLoadStatus = 0
+                this.loopLoad()
               }
-              this.imageList.push({ imageId: imageId, seriesId: series.seriesId, studyIndex: studyIndex, seriesIndex: seriesIndex, visitTaskId: series.visitTaskId, priority })
-            })
-            if (this.imageList.length > 0) {
-              this.loopLoadStatus = 0
-              this.loopLoad()
+            } else {
+              requestPoolManager.changePriority(series.seriesId)
             }
           }
 
@@ -668,7 +672,7 @@ export default {
       store.dispatch('reading/setActiveSeries', series)
     },
     loadImages(taskInfo) {
-      const isBaseLineTask = taskInfo.IsBaseLineTask
+      // const isBaseLineTask = taskInfo.IsBaseLineTask
       const isCurrentTask = taskInfo.IsCurrentTask
       // var priority = isCurrentTask ? parseInt(new Date().getTime()) : 999
       var priority = parseInt(new Date().getTime())
@@ -689,13 +693,12 @@ export default {
             //   })
             // }
             // 均只下载关键序列
-            if(!isCurrentTask && study.IsCriticalSequence){
+            if (!isCurrentTask && study.IsCriticalSequence) {
               series.imageIds.map(image => {
                 priority = priority - 1
                 this.imageList.push({ imageId: image, seriesId: series.seriesId, studyIndex: studyIndex, seriesIndex: seriesIndex, visitTaskId: series.visitTaskId, priority })
               })
             }
-
           }
         })
       })
@@ -704,15 +707,14 @@ export default {
 
     loopLoad() {
       if (this.imageList.length > 0) {
-        
-        requestPoolManager.startTaskTimer()
+        // requestPoolManager.startTaskTimer()
         this.imageList.map(image => {
           requestPoolManager.loadAndCacheImagePlus(image.imageId, image.seriesId, image.priority).then(res => {
             this.imageLoaded({ visitTaskId: this.visitTaskId, imageId: image.imageId }, res.data.string('x0020000e'))
           })
         })
         requestPoolManager.sortTaskPool()
-        
+
         this.imageList = []
       }
     },
@@ -721,15 +723,26 @@ export default {
       console.log('loadSeries')
       this.loopLoadStatus = -1
       this.$set(this.studyList[studyIndex].SeriesList[seriesIndex], 'isLoading', true)
-      const priority = parseInt(new Date().getTime())
-      series.imageIds.map(image => {
-        if (series.imageloadedArr.indexOf(image) === -1) {
-          this.imageList.push({ imageId: image, seriesId: series.seriesId, studyIndex: studyIndex, seriesIndex: seriesIndex, visitTaskId: series.visitTaskId, priority })
+      var isAddToTakPool = false
+      if (this.showSeriesList.includes(`${studyIndex}_${seriesIndex}`)) {
+        isAddToTakPool = true
+      } else {
+        this.showSeriesList.push(`${studyIndex}_${seriesIndex}`)
+      }
+      if (!isAddToTakPool) {
+        const priority = parseInt(new Date().getTime())
+        series.imageIds.map(image => {
+          const index = this.cachedImages.findIndex(item => item.uri === image)
+          if (index === -1) {
+            this.imageList.push({ imageId: image, seriesId: series.seriesId, studyIndex: studyIndex, seriesIndex: seriesIndex, visitTaskId: series.visitTaskId, priority })
+          }
+        })
+        if (this.imageList.length > 0) {
+          this.loopLoadStatus = 0
+          this.loopLoad()
         }
-      })
-      if (this.imageList.length > 0) {
-        this.loopLoadStatus = 0
-        this.loopLoad()
+      } else {
+        requestPoolManager.changePriority(series.seriesId)
       }
     },
     // 暂停下载
@@ -791,13 +804,13 @@ export default {
         }
       }
     },
-    cornerstoneimagecachechanged(e){
+    cornerstoneimagecachechanged(e) {
       const cacheInfo = cornerstone.imageCache.getCacheInfo()
       console.log(cacheInfo)
     },
-    cornerstoneimagecachefull(e){
+    cornerstoneimagecachefull(e) {
       console.log('超过内存了')
-    },
+    }
   }
 }
 </script>
@@ -809,6 +822,7 @@ export default {
   width:100%;
   height: 100%;
   overflow-y: auto;
+  overflow-x: hidden;
   .dicom-desc{
     font-weight: bold;
     font-size: 13px;