diff --git a/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLFastBuilder.cs b/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLFastBuilder.cs
index b56ac7732..0b32074cd 100644
--- a/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLFastBuilder.cs
+++ b/Src/Asp.NetCore2/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLFastBuilder.cs
@@ -100,10 +100,14 @@ namespace SqlSugar
                     foreach (var column in columnViews)
                     {
                         var value = row[column.DataColumn.ColumnName];
-                        if (value == null) 
+                        if (value == null)
                         {
                             value = DBNull.Value;
                         }
+                        else if (value is double) 
+                        {
+                            column.Type = NpgsqlDbType.Double;
+                        }
                         if (column.Type == null)
                         {
                             writer.Write(value);