diff --git a/Src/Asp.Net/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs b/Src/Asp.Net/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs
index f88510927..fbd7ac009 100644
--- a/Src/Asp.Net/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/Sqlite/SqlBuilder/SqliteExpressionContext.cs
@@ -20,6 +20,14 @@ namespace SqlSugar
             return string.Format("LENGTH({0})", parameter.MemberName);
         }
 
+        public override string Substring(MethodCallExpressionModel model)
+        {
+            var parameter = model.Args[0];
+            var parameter2 = model.Args[1];
+            var parameter3 = model.Args[2];
+            return string.Format("SUBSTR({0},1 + {1},{2})", parameter.MemberName, parameter2.MemberName, parameter3.MemberName);
+        }
+
         public override string Contains(MethodCallExpressionModel model)
         {
             var parameter = model.Args[0];
diff --git a/Src/Asp.Net/SqliteTest/DataBase/SqlSugar4xTest.sqlite b/Src/Asp.Net/SqliteTest/DataBase/SqlSugar4xTest.sqlite
index 5e1027163..a95643319 100644
Binary files a/Src/Asp.Net/SqliteTest/DataBase/SqlSugar4xTest.sqlite and b/Src/Asp.Net/SqliteTest/DataBase/SqlSugar4xTest.sqlite differ
diff --git a/Src/Asp.Net/SqliteTest/Demos/1_Query.cs b/Src/Asp.Net/SqliteTest/Demos/1_Query.cs
index ce785b2e1..8dde95a2e 100644
--- a/Src/Asp.Net/SqliteTest/Demos/1_Query.cs
+++ b/Src/Asp.Net/SqliteTest/Demos/1_Query.cs
@@ -156,6 +156,7 @@ namespace OrmTest.Demo
             var dbTime = db.GetDate();
             var getAll = db.Queryable<Student>().ToList();
             var getLike = db.Queryable<Student>().Where(it => it.Name.Contains("a")).ToList();
+            var getSub = db.Queryable<Student>().Where(it => it.Name.Substring(0,1)=="a").ToList();
             var getAllOrder = db.Queryable<Student>().OrderBy(it => it.Id).OrderBy(it => it.Name, OrderByType.Desc).ToList();
             var getId = db.Queryable<Student>().Select(it => it.Id).ToList();
             var getNew = db.Queryable<Student>().Where(it => it.Id == 1).Select(it => new { id = SqlFunc.IIF(it.Id == 0, 1, it.Id), it.Name, it.SchoolId }).ToList();
diff --git a/Src/Asp.Net/SqliteTest/UnitTest/ExpressionTest/Method.cs b/Src/Asp.Net/SqliteTest/UnitTest/ExpressionTest/Method.cs
index b99719431..b5bf6d7b5 100644
--- a/Src/Asp.Net/SqliteTest/UnitTest/ExpressionTest/Method.cs
+++ b/Src/Asp.Net/SqliteTest/UnitTest/ExpressionTest/Method.cs
@@ -130,7 +130,7 @@ namespace OrmTest.UnitTest
             expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
-            base.Check(value, pars, "(SUBSTRING(@MethodConst0,1 + @MethodConst1,@MethodConst2) = @Const3 )", new List<SugarParameter>() {
+            base.Check(value, pars, "(SUBSTR(@MethodConst0,1 + @MethodConst1,@MethodConst2) = @Const3 )", new List<SugarParameter>() {
                 new SugarParameter("@MethodConst0","aaaa"),   new SugarParameter("@MethodConst1",0) ,   new SugarParameter("@MethodConst2",2),new SugarParameter("@Const3","a")
             }, "Substring error");
         }
@@ -142,7 +142,7 @@ namespace OrmTest.UnitTest
             expContext.Resolve(exp, ResolveExpressType.WhereSingle);
             var value = expContext.Result.GetString();
             var pars = expContext.Parameters;
-            base.Check(value, pars, "(SUBSTRING(@MethodConst0,1 + @MethodConst1,@MethodConst2) = @Const3 )", new List<SugarParameter>() {
+            base.Check(value, pars, "(SUBSTR(@MethodConst0,1 + @MethodConst1,@MethodConst2) = @Const3 )", new List<SugarParameter>() {
                 new SugarParameter("@MethodConst0","aaaa"),   new SugarParameter("@MethodConst1",0) ,   new SugarParameter("@MethodConst2",2),new SugarParameter("@Const3","a")
             }, "Substring error");
         }