Abstract: Many phenomenon and findings have demonstrated that heavy mental pollutants transport through the carrier of sediment.So,to describe the complicated process,it is very important to firmly grasp two important factors:sediment motion and its relationship with heavy metal pollutants transport.In this article,the present existing models on heavy metal pollutants transport are generalized and classified.Base on analysis of the interaction relationship between sediment and pollutants,a coupling model on heavy metal pollutants transport is obtained by combing environment chemistry and mechanics of sediment motion.The sediment motion and the dynamic process of heavy metal's adsorption and release are considered in the model.To prove the model's rationality,theoretical analysis and computational comparison are also conducted,the result shows that the model can describe the complicated procession properly.