diff --git a/public/static/ueditorPlus/ueditor.config.js b/public/static/ueditorPlus/ueditor.config.js
index 7c9cfd1..5006162 100644
--- a/public/static/ueditorPlus/ueditor.config.js
+++ b/public/static/ueditorPlus/ueditor.config.js
@@ -50,7 +50,7 @@
 
 
     // 服务器统一请求接口路径
-    serverUrl: "http://192.168.31.51:9000/exam/exam/upload/configAndUpload",
+    serverUrl: "http://121.37.12.51/exam/exam/upload/configAndUpload",
     imageActionName: "imgUpload",
     imageAllowFiles: [
       ".png",
diff --git a/src/components/ueditor/index.vue b/src/components/ueditor/index.vue
index 93b305b..1d97a15 100644
--- a/src/components/ueditor/index.vue
+++ b/src/components/ueditor/index.vue
@@ -46,7 +46,7 @@ export default {
         // eslint-disable-next-line no-undef
         this.instance = UE.getEditor(this.randomId, {
           UEDITOR_HOME_URL: '/static/ueditorPlus/',
-          serverUrl: "http://192.168.31.51:9000/exam/exam/upload/configAndUpload",
+          serverUrl: "http://121.37.12.51/exam/exam/upload/configAndUpload",
           plugins: 'gapfilling'
         })
 
diff --git a/src/const/ques.js b/src/const/ques.js
index f073468..ba8d6e5 100644
--- a/src/const/ques.js
+++ b/src/const/ques.js
@@ -2,19 +2,23 @@ export default {
   difficults: [
     {
       id: 'basic',
-      name: '基础'
+      name: '基础',
+      coefficient: 0.2 // 难度系数，试卷里计算试卷难度专用
     },
     {
       id: 'easy',
-      name: '普通'
+      name: '普通',
+      coefficient: 0.4
     },
     {
       id: 'medium',
-      name: '较难'
+      name: '较难',
+      coefficient: 0.6
     },
     {
       id: 'hard',
-      name: '难'
+      name: '难',
+      coefficient: 0.8
     },
   ],
   questionTypes: [
diff --git a/src/pages/testPaper/detail/auto.vue b/src/pages/testPaper/detail/auto.vue
index 607ee3c..0097f4a 100644
--- a/src/pages/testPaper/detail/auto.vue
+++ b/src/pages/testPaper/detail/auto.vue
@@ -405,6 +405,7 @@ export default {
           this.$parent.form.paperOutline[i].examQuestions = res.list[i].questions
         })
         this.quesVisible = false
+        this.$parent.calcDifficult()
         this.submiting = false
       } catch (e) {
         this.submiting = false
diff --git a/src/pages/testPaper/detail/index.vue b/src/pages/testPaper/detail/index.vue
index b18f394..37516ce 100644
--- a/src/pages/testPaper/detail/index.vue
+++ b/src/pages/testPaper/detail/index.vue
@@ -38,7 +38,7 @@
           </el-select>
         </el-form-item>
         <el-form-item prop="difficult" label="试卷难度">
-          <el-select v-model="form.difficult" clearable placeholder="系统自动评估，也可手动选择">
+          <el-select v-model="form.difficult" placeholder="系统自动评估，也可手动选择" @change="difficultSelected = true">
             <el-option v-for="(item, i) in difficults" :key="i" :label="item.name" :value="item.id"></el-option>
           </el-select>
           <el-tooltip placement="top">
@@ -307,6 +307,8 @@ export default {
       quesVisible: false,
       curRow: {},
       detailType: '',
+
+      difficultSelected: false,
     };
   },
   computed: {
@@ -443,6 +445,29 @@ export default {
         })
       }
     },
+    // 自动计算试卷难度
+    calcDifficult () {
+      // 如果试卷难度用户已经选择过了，则不用再计算；如果没选择过，则通过公式计算难度：所有试题的难度系数之和/总试题数
+      if (this.difficultSelected) return false
+      let coefficient = 0 // 试题总系数
+      let len = 0 // 试题总数
+      const diffs = QuesConst.difficults
+      this.form.paperOutline.map(e => {
+        len += e.examQuestions.length
+        coefficient += e.examQuestions.reduce((e, j) => {
+          const val = diffs.find(n => n.id === j.difficulty)
+          return e += val ? +val.coefficient : 0
+        }, 0)
+      })
+      const result = coefficient / len
+      this.form.difficult = result <= 0.3 ?
+        1 :
+        result > 0.3 && result <= 0.4 ?
+          2 :
+          result > 0.4 && result <= 0.5 ?
+            3 :
+            4
+    },
     // 自动选题
     showAuto () {
       this.autoVisible = true
@@ -482,6 +507,7 @@ export default {
       delete ques.questionAnswerVersions
       ques.questionVersionId = id
       this.curType.examQuestions[this.curQuesIndex] = Object.assign(this.curRow, ques)
+      this.calcDifficult()
     },
     // 添加题目
     showManualDia (item, i, ques) {
@@ -505,6 +531,7 @@ export default {
             const cur = item.examQuestions.findIndex(n => n.questionVersionId === e.questionVersionId)
             cur >= 0 && item.examQuestions.splice(cur, 1)
           })
+          this.calcDifficult()
         } else {
           Util.warningMsg('请选择数据')
         }
@@ -532,6 +559,7 @@ export default {
     // 移除试题
     delQues (item, i) {
       item.examQuestions.splice(i, 1)
+      this.calcDifficult()
     },
     // 提交
     async submit (status) {
diff --git a/src/pages/testPaper/detail/manual.vue b/src/pages/testPaper/detail/manual.vue
index 2006c1d..5209bc5 100644
--- a/src/pages/testPaper/detail/manual.vue
+++ b/src/pages/testPaper/detail/manual.vue
@@ -348,6 +348,7 @@ export default {
           this.$set(e, 'serialNumber', i + 1)
         })
 
+        this.$parent.calcDifficult()
         this.selectQuesVisible = false
         this.submiting = false
       } catch (e) {