diff --git a/HealthMonitor.Service/Biz/db/TDengineService.cs b/HealthMonitor.Service/Biz/db/TDengineService.cs
index e3cd7f7..da6d2fa 100644
--- a/HealthMonitor.Service/Biz/db/TDengineService.cs
+++ b/HealthMonitor.Service/Biz/db/TDengineService.cs
@@ -26,6 +26,7 @@ using TDengineDriver.Impl;
 using TDengineTMQ;
 using HealthMonitor.Service.Cache;
 using System.Text.RegularExpressions;
+using Etcdserverpb;
 
 namespace HealthMonitor.Service.Biz.db
 {
@@ -1153,6 +1154,19 @@ namespace HealthMonitor.Service.Biz.db
                     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)
+            {
+                maxValue = 100;
+            }
+
+            if (minValue >= 60 && minValue <= 100)
+            {
+                minValue = 60;  
+            }
 
             return new PregnancyCommonHeartRateModel()
             {
@@ -1162,8 +1176,8 @@ namespace HealthMonitor.Service.Biz.db
                 SerialNumber = collection.First().SerialNumber,
                 Mode = mode,
                 Percentage = percentage,
-                MaxValue = closestToModeData.Max(),
-                MinValue = closestToModeData.Min(),
+                MaxValue = maxValue,
+                MinValue = minValue,
                 OriginalMaxValue = res.Max(),
                 OriginalMinValue = res.Min(),
                 CreateTime = DateTime.Now,