diff --git a/src/views/modules/sampleTracking/projectProofTracking.vue b/src/views/modules/sampleTracking/projectProofTracking.vue
index dcfa1a4..2d8f115 100644
--- a/src/views/modules/sampleTracking/projectProofTracking.vue
+++ b/src/views/modules/sampleTracking/projectProofTracking.vue
@@ -3302,10 +3302,21 @@ export default {
         pushDate(item.oldActualDate)
       })
 
-      if (dateList.length === 0) {
+      if (dateList.length <= 1) {
         return ''
       }
-      return dateList.join('\n')
+      // tooltip 只展示历史日期，不展示最近一次日期（当前值）以避免重复。
+      const latestDate = dateList.reduce((max, currentDate) => {
+        if (!max || currentDate > max) {
+          return currentDate
+        }
+        return max
+      }, '')
+      const historyDateList = dateList.filter(item => item !== latestDate)
+      if (historyDateList.length === 0) {
+        return ''
+      }
+      return historyDateList.join('\n')
     },
     isProcessComplete (row, processCol) {
       if (!row || !processCol) {