Agricultural non-point source pollution is becoming a pressing problem.With the further research of agricultural non-point source pollution，the effects of drainage ditch in reducing agricultural non- point source pollution has been gradually paid more attention. On the base of brief analysis for the feature and function of diainage ditche. This paper reviewed the migration and transformation of drainage ditches for nitrogen and phosphorus from non-point source pollution. In the light of current research conditions, the paper put forward the problems of further research,which inclode the secondary pollution of plant and sediment in ditches, the solute purification and the formation mechanism of endogenous pollution of non-point source pollution in the agricultural drainage ditches, the influence of agriculture drainage ditch on the biodiversity of farmland ecosystem and the research on the relationship between secondary soil salinization and agricultural drainage ditches. The purpose is to provide the reference for the study of controlling the agricultural non-point source pollution.