diff --git a/Src/Asp.NetCore2/SqlSugar.TDengineCore/TDengine/TDengineProvider.cs b/Src/Asp.NetCore2/SqlSugar.TDengineCore/TDengine/TDengineProvider.cs
index e27172f70..5d077bd8e 100644
--- a/Src/Asp.NetCore2/SqlSugar.TDengineCore/TDengine/TDengineProvider.cs
+++ b/Src/Asp.NetCore2/SqlSugar.TDengineCore/TDengine/TDengineProvider.cs
@@ -99,11 +99,11 @@ namespace SqlSugar.TDengine
                     parameter.Value = parameter.Value?.ToString()?.ToLower();
                 }
                 var sqlParameter = new TDengineParameter(parameter.ParameterName,parameter.Value,parameter.DbType,0);
-                if (parameter.CustomDbType?.Equals(System.Data.DbType.DateTime2) == true|| _IsMicrosecond)
+                if (parameter.CustomDbType?.Equals(System.Data.DbType.DateTime2) == true|| (parameter.Value is DateTime&&_IsMicrosecond))
                 {
                     sqlParameter.IsMicrosecond = true;
                 }
-                else if (parameter.CustomDbType?.Equals(typeof(Date19)) == true|| _IsIsNanosecond)
+                else if (parameter.CustomDbType?.Equals(typeof(Date19)) == true|| (parameter.Value is DateTime && _IsIsNanosecond))
                 {
                     sqlParameter.IsNanosecond = true;
                 }