diff --git a/src/views/trials/trials-panel/reading/dicoms/customize/CustomizeQuestionTableFormItem.vue b/src/views/trials/trials-panel/reading/dicoms/customize/CustomizeQuestionTableFormItem.vue
index ca9732b9..91316b09 100644
--- a/src/views/trials/trials-panel/reading/dicoms/customize/CustomizeQuestionTableFormItem.vue
+++ b/src/views/trials/trials-panel/reading/dicoms/customize/CustomizeQuestionTableFormItem.vue
@@ -379,23 +379,27 @@ export default {
               num = parseFloat(this.questionForm[o.TableQuestionId])
             }
           } else {
-            switch (rules.CustomCalculateMark) {
-              case 1:
-                num += parseFloat(this.questionForm[o.TableQuestionId])
-                break;
-              case 2:
-                num -= parseFloat(this.questionForm[o.TableQuestionId])
-                break;
-              case 3:
-                num *= parseFloat(this.questionForm[o.TableQuestionId])
-                break;
-              case 4:
-                if (parseFloat(this.questionForm[o.TableQuestionId]) === 0) {
-                  num = 0
-                } else {
-                  num /= parseFloat(this.questionForm[o.TableQuestionId])
-                }
-                break;
+            if (i !== 0) {
+              switch (rules.CustomCalculateMark) {
+                case 1:
+                  num += parseFloat(this.questionForm[o.TableQuestionId])
+                  break;
+                case 2:
+                  num -= parseFloat(this.questionForm[o.TableQuestionId])
+                  break;
+                case 3:
+                  num *= parseFloat(this.questionForm[o.TableQuestionId])
+                  break;
+                case 4:
+                  if (parseFloat(this.questionForm[o.TableQuestionId]) === 0) {
+                    num = 0
+                  } else {
+                    num /= parseFloat(this.questionForm[o.TableQuestionId])
+                  }
+                  break;
+              }
+            } else {
+              num = parseFloat(this.questionForm[o.TableQuestionId])
             }
           }
         })