diff --git a/src/views/spectrumAnalysis/components/Modals/LoadFromDBModal.vue b/src/views/spectrumAnalysis/components/Modals/LoadFromDBModal.vue
index ae711a8..248e78d 100644
--- a/src/views/spectrumAnalysis/components/Modals/LoadFromDBModal.vue
+++ b/src/views/spectrumAnalysis/components/Modals/LoadFromDBModal.vue
@@ -114,7 +114,7 @@ export default {
     return {
       queryParam: {
         menuTypes: 'G,B',
-        sampleType: 'P',
+        sampleType: '',
         startDate: moment().add(-7, 'd').format('YYYY-MM-DD'),
         endDate: moment().format('YYYY-MM-DD'),
         dbName: 'auto',
@@ -326,13 +326,19 @@ export default {
               ]
               if (event == 'B') {
                 this.sampleTypeOption = arr_B
-                this.queryParam.sampleType = 'B'
+                this.$nextTick(() => {
+                  this.queryParam.sampleType = 'B'
+                })
               } else if (event == 'G') {
                 this.sampleTypeOption = arr_G
-                this.queryParam.sampleType = 'P'
+                this.$nextTick(() => {
+                  this.queryParam.sampleType = 'P'
+                })
               } else {
                 this.sampleTypeOption = arr_A
-                this.queryParam.sampleType = 'P'
+                this.$nextTick(() => {
+                  this.queryParam.sampleType = ''
+                })
               }
               this.getStationAndDetectorList(event)
             },