diff --git a/HealthMonitor.Service/Biz/db/TDengineService.cs b/HealthMonitor.Service/Biz/db/TDengineService.cs
index 490b0f4..ec89221 100644
--- a/HealthMonitor.Service/Biz/db/TDengineService.cs
+++ b/HealthMonitor.Service/Biz/db/TDengineService.cs
@@ -979,9 +979,9 @@ namespace HealthMonitor.Service.Biz.db
 
             _logger.LogInformation($"IMEI {serialNo},EDOC:{edoc},NOW:{DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")},SinceNOW:{DateTimeUtil.GetDateTimeFromUnixTimeMilliseconds(edoc).AddDays(-280).ToString("yyyy-MM-dd HH:mm:ss")},怀孕周数 {pregnancyWeek}");
 
-            var statMaxValueFprCoefficient = 0;
-            var statMinValueFprCoefficient = 0;
-            var StatModeAvgFprCoefficient = 0;
+            float statMaxValueFprCoefficient = 0f;
+            float statMinValueFprCoefficient = 0f;
+            float StatModeAvgFprCoefficient = 0f;
             // 20-45周之间
             if (pregnancyWeek >= 12 && pregnancyWeek <= 45)
             {
@@ -995,9 +995,9 @@ namespace HealthMonitor.Service.Biz.db
 
                 if (map != null)
                 {
-                    statMaxValueFprCoefficient = map.FetalHeartRateRange![1] / res.Max();
-                    statMinValueFprCoefficient = map.FetalHeartRateRange[0]/res.Min();
-                    StatModeAvgFprCoefficient = map.FetalHeartRateAverage / mode;
+                    statMaxValueFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateRange![1] / res.Max(), 3);
+                    statMinValueFprCoefficient = (float)Math.Round((decimal)map.FetalHeartRateRange[0] / res.Min(), 3);
+                    StatModeAvgFprCoefficient =  (float)Math.Round((decimal)map.FetalHeartRateAverage / mode, 3);
                 }
             }