diff --git a/Src/Asp.Net/SqlServerTest/Demos/1_Query.cs b/Src/Asp.Net/SqlServerTest/Demos/1_Query.cs
index 6a4daf346..8ae83bb29 100644
--- a/Src/Asp.Net/SqlServerTest/Demos/1_Query.cs
+++ b/Src/Asp.Net/SqlServerTest/Demos/1_Query.cs
@@ -385,6 +385,8 @@ namespace OrmTest.Demo
             var test6 = db.Queryable<DataTestInfo2>().Where(it => SqlFunc.HasValue(it.Bool2)==true && SqlFunc.HasValue(it.Bool2)==true).ToList();
             var test7 = db.Queryable<DataTestInfo2>().Where(it => SqlFunc.HasValue(it.Bool1) && SqlFunc.HasValue(it.Bool1)).ToList();
             var test8 = db.Queryable<Student>().Where(it => SqlFunc.HasValue(it.SchoolId) && SqlFunc.HasValue(it.SchoolId)).ToList();
+            bool? b = false;
+            var test9 = db.Queryable<DataTestInfo2>().Where(it => it.Bool1 == b).ToList();
         }
         public static void Page()
         {
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/ExpressionTest/Where.cs b/Src/Asp.Net/SqlServerTest/UnitTest/ExpressionTest/Where.cs
index f14a3f2dd..8cab100dc 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/ExpressionTest/Where.cs
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/ExpressionTest/Where.cs
@@ -82,7 +82,23 @@ namespace OrmTest.UnitTest
             var pars = expContext.Parameters;
             base.Check(value, pars, "( [Bool2] = @Bool20 )", new List<SugarParameter>() {
                 new SugarParameter("@Bool20",false)
-            }, "whereSingle30");
+            }, "whereSingle31");
+
+            whereSingle32();
+        }
+
+
+        private void whereSingle32()
+        {
+            bool? b = false;
+            Expression<Func<DataTestInfo2, bool>> exp = it => it.Bool1 == b;
+            SqlServerExpressionContext expContext = new SqlServerExpressionContext();
+            expContext.Resolve(exp, ResolveExpressType.WhereSingle);
+            var value = expContext.Result.GetString();
+            var pars = expContext.Parameters;
+            base.Check(value, pars, "( [Bool1] = @Bool10 )", new List<SugarParameter>() {
+                new SugarParameter("@Bool10",false)
+            }, "whereSingle32");
         }
 
         public string Get28(string a) {
diff --git a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BinaryExpressionResolve.cs b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BinaryExpressionResolve.cs
index f4779919e..5d69baebd 100644
--- a/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BinaryExpressionResolve.cs
+++ b/Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/BinaryExpressionResolve.cs
@@ -36,6 +36,10 @@ namespace SqlSugar
             {
                 leftExpression = (leftExpression as UnaryExpression).Operand;
             }
+            if (leftExpression is UnaryExpression && (leftExpression as UnaryExpression).Operand.Type == UtilConstants.BoolType && (leftExpression as UnaryExpression).NodeType != ExpressionType.Not&&rightExpression.Type==UtilConstants.BoolTypeNull)
+            {
+                leftExpression = (leftExpression as UnaryExpression).Operand;
+            }
             if (rightExpression is UnaryExpression&& (rightExpression as UnaryExpression).Operand.Type==UtilConstants.BoolType&& (rightExpression as UnaryExpression).NodeType != ExpressionType.Not)
             {
                 rightExpression = (rightExpression as UnaryExpression).Operand;
diff --git a/Src/Asp.Net/SqlSugar/Utilities/UtilConstants.cs b/Src/Asp.Net/SqlSugar/Utilities/UtilConstants.cs
index 0119b2a9d..b37082eac 100644
--- a/Src/Asp.Net/SqlSugar/Utilities/UtilConstants.cs
+++ b/Src/Asp.Net/SqlSugar/Utilities/UtilConstants.cs
@@ -19,6 +19,7 @@ namespace SqlSugar
         internal static Type LongType = typeof(long);
         internal static Type GuidType = typeof(Guid);
         internal static Type BoolType = typeof(bool);
+        internal static Type BoolTypeNull = typeof(bool?);
         internal static Type ByteType = typeof(Byte);
         internal static Type ObjType = typeof(object);
         internal static Type DobType = typeof(double);