Abstract: The migration and transformation of agricultural non-point source pollutants in drainage ditches is an important step of agricultural non-point source pollution control and management. On the bases of analyses on the ecological structure and characteristics of drainage ditches, the ecology function of deposited materials, aquatic plant and microorganisms, and the interaction mechanism of these components to nitrogen, phosphorus pollutants were summarized. The study advances that further research should focus on the aspects of quantitative study on the reactions of different components of drainage ditch ecosystem, the migration model of agricultural non-point source pollutants in drainage ditches, and the relationship between ditch-wetland applications and regional eco-environments.