diff --git a/HybirdFrameworkCore/Utils/BitUtls.cs b/HybirdFrameworkCore/Utils/BitUtls.cs
index 15337a2..fcc87b8 100644
--- a/HybirdFrameworkCore/Utils/BitUtls.cs
+++ b/HybirdFrameworkCore/Utils/BitUtls.cs
@@ -54,17 +54,13 @@ public static class BitUtls
 
         if (propertyType == STRING)
         {
-            return Convert.ChangeType(Encoding.ASCII.GetString(bytes, start, length/8), propertyType);
+            byte[] sub = Sub(bytes, start, length);
+            return Convert.ChangeType(Encoding.ASCII.GetString(sub), propertyType);
         }
 
         if (propertyType == BYTEARRAY)
         {
-            length = length / 8;
-            var bt = new byte[length];
-            start = start / 8;
-            for (var i = start; i < start + length; i++) bt[i - start] = bytes[i];
-
-            return bt;
+            return Sub(bytes, start, length);
         }
 
         throw new ArgumentException($"参数类型{propertyType}不支持encode！");