diff --git a/epmet-module/data-statistical/data-statistical-server/src/main/resources/mapper/evaluationindex/indexcoll/ScreenPyHistoryScoreDao.xml b/epmet-module/data-statistical/data-statistical-server/src/main/resources/mapper/evaluationindex/indexcoll/ScreenPyHistoryScoreDao.xml
index 1b311eb25c..c8d61d6d6d 100644
--- a/epmet-module/data-statistical/data-statistical-server/src/main/resources/mapper/evaluationindex/indexcoll/ScreenPyHistoryScoreDao.xml
+++ b/epmet-module/data-statistical/data-statistical-server/src/main/resources/mapper/evaluationindex/indexcoll/ScreenPyHistoryScoreDao.xml
@@ -58,7 +58,7 @@
 
     <select id="sumGridNum" resultType="com.epmet.dto.indexcollect.result.HistoryScoreSjffResultDTO">
         SELECT
-            COUNT(id) gridStaffNum
+            COUNT(DISTINCT STAFF_ID) gridStaffNum
         FROM
             screen_py_grid_staff
         WHERE