diff --git a/SqlSugar/Abstract/SqlBuilderProvider/InsertBuilder.cs b/SqlSugar/Abstract/SqlBuilderProvider/InsertBuilder.cs
index 6f1d70c0a..4ccc9a972 100644
--- a/SqlSugar/Abstract/SqlBuilderProvider/InsertBuilder.cs
+++ b/SqlSugar/Abstract/SqlBuilderProvider/InsertBuilder.cs
@@ -163,7 +163,7 @@ namespace SqlSugar
                     {
                         date = Convert.ToDateTime("1900-1-1");
                     }
-                    return "'" + date.ToString("yyyy-MM-dd hh:mm:ss.fff") + "'";
+                    return "'" + date.ToString("yyyy-MM-dd HH:mm:ss.fff") + "'";
                 }
                 else if (type == PubConst.BoolType)
                 {
diff --git a/SqlSugar/Abstract/SqlBuilderProvider/UpdateBuilder.cs b/SqlSugar/Abstract/SqlBuilderProvider/UpdateBuilder.cs
index 90ff60e2b..11374ea30 100644
--- a/SqlSugar/Abstract/SqlBuilderProvider/UpdateBuilder.cs
+++ b/SqlSugar/Abstract/SqlBuilderProvider/UpdateBuilder.cs
@@ -256,7 +256,7 @@ namespace SqlSugar
                     if (date < Convert.ToDateTime("1900-1-1")) {
                         date = Convert.ToDateTime("1900-1-1");
                     }
-                    return "'" + date.ToString("yyyy-MM-dd hh:mm:ss.fff") + "'";
+                    return "'" + date.ToString("yyyy-MM-dd HH:mm:ss.fff") + "'";
                 }
                 else if (type == PubConst.BoolType)
                 {