Abstract: According to the shortages of a large number of workload will be triggered in the business layer and database layer by reason of the database model changes, this paper puts forward a new framework design pattern which uses the iBATIS data persistence layer framework and the data dictionary technology, establishing jointly double persistence layer during the database system development.When the database model needs to change, it can easily to realize synchronous maintenance of the data persistence layer and the database model through the operation of the data dictionary.The method has high efficiency and good portability.