diff --git a/HybirdFrameworkCore/Utils/BitUtls.cs b/HybirdFrameworkCore/Utils/BitUtls.cs
index 3207533..075bb4c 100644
--- a/HybirdFrameworkCore/Utils/BitUtls.cs
+++ b/HybirdFrameworkCore/Utils/BitUtls.cs
@@ -15,10 +15,11 @@ public static class BitUtls
     /// <param name="scale">精度</param>
     /// <param name="round">保留几位小数</param>
     /// <param name="offset">位偏移</param>
+    /// <param name="unSign">对float和double 默认无符号</param>
     /// <returns></returns>
     /// <exception cref="ArgumentException"></exception>
     public static object Bytes2Value(byte[] bytes, Type propertyType, int start, int length,
-        double scale, int round, double offset)
+        double scale, int round, double offset, bool unSign = true)
     {
         if (propertyType == BOOLEAN) return Convert.ChangeType(Byte2Bit(bytes, start, length) == 1, propertyType);
 
@@ -44,11 +45,11 @@ public static class BitUtls
 
         if (propertyType == FLOAT)
             return
-                Convert.ChangeType(Math.Round(Byte2Float(bytes, start, length, scale) - offset, round), propertyType);
+                Convert.ChangeType(Math.Round(Byte2Float(bytes, start, length, scale, unSign) - offset, round), propertyType);
 
         if (propertyType == DOUBLE)
             return
-                Convert.ChangeType(Math.Round(Byte2Double(bytes, start, length, scale) - offset, round),
+                Convert.ChangeType(Math.Round(Byte2Double(bytes, start, length, scale, unSign) - offset, round),
                     propertyType);
 
         if (propertyType == STRING)
@@ -220,23 +221,23 @@ public static class BitUtls
         return list.ToArray();
     }
 
-    public static float Byte2Float(byte[] bytes, int startBit, int length, double factor)
+    public static float Byte2Float(byte[] bytes, int startBit, int length, double factor, bool unSign)
     {
         if (length < 17)
         {
-            int d = Byte2Int16(bytes, startBit, length);
+            int d =unSign ? Byte2UInt16(bytes, startBit, length) : Byte2Int16(bytes, startBit, length);
             return (float)(d * factor);
         }
         else
         {
-            var d = Byte2Int32(bytes, startBit, length);
+            Int64 d = unSign ? Byte2UInt32(bytes, startBit, length) :  Byte2Int32(bytes, startBit, length) ;
             return (float)(d * factor);
         }
     }
 
-    public static double Byte2Double(byte[] bytes, int startBit, int length, double factor)
+    public static double Byte2Double(byte[] bytes, int startBit, int length, double factor, bool unSign)
     {
-        var d = Byte2UInt32(bytes, startBit, length);
+        Int64 d = unSign ? Byte2UInt32(bytes, startBit, length) :  Byte2Int32(bytes, startBit, length);
         return (float)(d * factor);
     }
 
diff --git a/HybirdFrameworkDriver/ModbusTcpMaster/ModbusDecoder.cs b/HybirdFrameworkDriver/ModbusTcpMaster/ModbusDecoder.cs
index fee6009..08521d0 100644
--- a/HybirdFrameworkDriver/ModbusTcpMaster/ModbusDecoder.cs
+++ b/HybirdFrameworkDriver/ModbusTcpMaster/ModbusDecoder.cs
@@ -91,7 +91,7 @@ public static class ModbusDecoder
                 }
                 case ModbusProperty<float> floatProperty:
                 {
-                    SetPropertyValue(startRegisterNo, floatProperty, decodeUseBytes);
+                    SetPropertyValue(startRegisterNo, floatProperty, decodeUseBytes, true);
                     // SetPropertyValue(floatProperty.RegisterNo, floatProperty, decodeUseBytes);
                     break;
                 }
@@ -112,7 +112,7 @@ public static class ModbusDecoder
         return t;
     }
 
-    private static void SetPropertyValue<T>(int startRegisterNo, ModbusProperty<T> field, byte[] bytes)
+    private static void SetPropertyValue<T>(int startRegisterNo, ModbusProperty<T> field, byte[] bytes, bool unSign = true)
     {
         var registerNo = field.RegisterNo;
         var start = field.Start;
@@ -134,7 +134,7 @@ public static class ModbusDecoder
                 _ => length
             };
 
-        var value = BitUtls.Bytes2Value(bytes, valueType, start, length, scale, round, offset);
+        var value = BitUtls.Bytes2Value(bytes, valueType, start, length, scale, round, offset, unSign);
         field.Value = (T)value;
     }
 }
\ No newline at end of file