diff --git a/HealthMonitor.Service/Biz/db/TDengineService.cs b/HealthMonitor.Service/Biz/db/TDengineService.cs
index 84db3c6..81cb78e 100644
--- a/HealthMonitor.Service/Biz/db/TDengineService.cs
+++ b/HealthMonitor.Service/Biz/db/TDengineService.cs
@@ -1151,6 +1151,23 @@ namespace HealthMonitor.Service.Biz.db
             float statMaxValueFprCoefficient = 0f;
             float statMinValueFprCoefficient = 0f;
             float StatModeAvgFprCoefficient = 0f;
+
+            // 如果最大值与最小值在60~100范围内，都按个固定值下发高频阈值。
+            var maxValue = closestToModeData.Max();
+            var minValue = closestToModeData.Min();
+
+            //if ((maxValue >= 60 && maxValue <= 100) && (minValue >= 60 && minValue <= 100))
+            //{
+            //    minValue = 60;
+            //    maxValue = 100;
+            //}
+            // 最小值不能少于60
+            minValue = minValue < 60 ? 60 : minValue;
+
+            // 最大值不能少于100
+            maxValue= maxValue < 100 ? 100 : maxValue;    
+
+
             // 20-45周之间
             if (pregnancyWeek >= 12 && pregnancyWeek <= 45)
             {
@@ -1164,20 +1181,15 @@ namespace HealthMonitor.Service.Biz.db
 
                 if (map != null)
                 {
-                    statMaxValueFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateRange![1] / closestToModeData.Max(), 3);
-                    statMinValueFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateRange[0] / closestToModeData.Min(), 3);
+                    //statMaxValueFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateRange![1] / closestToModeData.Max(), 3);
+                    //statMinValueFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateRange[0] / closestToModeData.Min(), 3);
+
+                    statMaxValueFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateRange![1] / maxValue, 3);
+                    statMinValueFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateRange[0] / minValue, 3);
                     StatModeAvgFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateAverage / mode, 3);
                 }
             }
-            // 如果最大值与最小值在60~100范围内，都按个固定值下发高频阈值。
-            var maxValue = closestToModeData.Max();
-            var minValue = closestToModeData.Min();
-
-            if ((maxValue >= 60 && maxValue <= 100) && (minValue >= 60 && minValue <= 100))
-            {
-                minValue = 60;
-                maxValue = 100;
-            }
+            
 
             return new PregnancyCommonHeartRateModel()
             {