diff --git a/DentistryHandpieces/MainWindowViewModel.cs b/DentistryHandpieces/MainWindowViewModel.cs
index b416ff5..0e55dcb 100644
--- a/DentistryHandpieces/MainWindowViewModel.cs
+++ b/DentistryHandpieces/MainWindowViewModel.cs
@@ -1989,6 +1989,7 @@ public sealed class MainWindowViewModel : ObservableObject
         await WriteChangedFloatAsync(SpeedCoefficientRegister, "转速系数", current.SpeedCoefficient, updated.SpeedCoefficient);
         await WriteChangedFloatAsync(SpeedStopThresholdRegister, "低速停止", current.SpeedStopThreshold, updated.SpeedStopThreshold);
         await WriteChangedFloatAsync(PressureCoefficientRegister, "压力系数", current.PressureCoefficient, updated.PressureCoefficient);
+        await WriteChangedTenthsAsync(HoldTorqueRegister, "保持扭矩设置", current.HoldTorque, updated.HoldTorque);
 
         return changedItems;
 
@@ -2012,6 +2013,26 @@ public sealed class MainWindowViewModel : ObservableObject
             Log.Information("PLC参数写入并回读确认成功，参数 {FieldName}，D{RegisterAddress}={Value}", fieldName, registerAddress, confirmedValue);
         }
 
+        async Task WriteChangedTenthsAsync(ushort registerAddress, string fieldName, double oldValue, double newValue)
+        {
+            ushort oldRaw = ScaleTenthsToPlc(oldValue, fieldName);
+            ushort newRaw = ScaleTenthsToPlc(newValue, fieldName);
+            if (oldRaw == newRaw)
+            {
+                return;
+            }
+
+            await _plcRegisterService.WriteUInt16Async(plcConfig, registerAddress, newRaw);
+            ushort confirmedRawValue = await _plcRegisterService.ReadUInt16Async(plcConfig, registerAddress);
+            if (confirmedRawValue != newRaw)
+            {
+                throw new InvalidOperationException($"{fieldName} D{registerAddress} 写入后回读不一致。");
+            }
+
+            changedItems.Add(fieldName);
+            Log.Information("PLC参数写入并回读确认成功，参数 {FieldName}，D{RegisterAddress}={Value}", fieldName, registerAddress, ScaleTenthsFromPlc(confirmedRawValue));
+        }
+
     }
 
     private bool TryReadParameterPageConfig(out TestParameterConfig config, out string error)