diff --git a/HealthMonitor.WebApi/Controllers/HealthMonitor/HmBloodPressController.cs b/HealthMonitor.WebApi/Controllers/HealthMonitor/HmBloodPressController.cs
index bd0e4f3..9ad1a5a 100644
--- a/HealthMonitor.WebApi/Controllers/HealthMonitor/HmBloodPressController.cs
+++ b/HealthMonitor.WebApi/Controllers/HealthMonitor/HmBloodPressController.cs
@@ -144,9 +144,9 @@ namespace HealthMonitor.WebApi.Controllers.HealthMonitor
             // 偏移参数
             var avgOffset = 0.25M;
 
-            // 增量值
-            var systolicInc = systolicAvg.Equals(0M) ? 0:(int)(systolicRefValue - systolicAvg * avgOffset)!;
-            var diastolicInc = diastolicAvg.Equals(0M) ? 0 : (int)(diastolicRefValue - diastolicAvg * avgOffset)!;
+            // 增量值=（标定值-平均值）* 0.25
+            var systolicInc = systolicAvg.Equals(0M) ? 0: (int)((systolicRefValue - systolicAvg)* avgOffset)!;
+            var diastolicInc = diastolicAvg.Equals(0M) ? 0 : (int)((diastolicRefValue - diastolicAvg) * avgOffset)!;
 
             #endregion