diff --git a/src/views/abnormalAlarm/analysisMonitor/avgNuclide/index.vue b/src/views/abnormalAlarm/analysisMonitor/avgNuclide/index.vue
index 0e70072..33dbb8b 100644
--- a/src/views/abnormalAlarm/analysisMonitor/avgNuclide/index.vue
+++ b/src/views/abnormalAlarm/analysisMonitor/avgNuclide/index.vue
@@ -52,7 +52,10 @@
           v-decorator="[
             'days', 
             { 
-              rules: [{ required: true, message: 'Please input days!' }],
+              rules: [
+                { required: true, message: 'Please input days!' },
+                { pattern: new RegExp('^[1-9]\\d*$'), message: 'Please input a positive integer!' },
+              ],
               initialVale: this.formVal.days
             }
           ]"