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Considering the current database cleaning based on static data source rather than on dynamic data source, this paper proposes a dynamic data cleaning modeling to solve this question. The modeling improves the efficiency of dynamic data cleaning and ensures the quality of dynamic data. It describes the design of some key technologies of the modeling, such as dynamic database, dynamic rule base, dynamic class files of cleaning rule, initializing before cleaning, and dynamic data cleaning processing flow in detail. It also presents a dynamic rule adjunction, compilation and execution method by using the Object Java language which has the advantages of robustness and portability.