Abstract: The domestic and foreign current research on the effect of ecohydrological process on water environment includes following topics,namely the development of the ecohydrological process,the ecological water requirement based on the ecohy-drological patterns,the effects of ecohydrological process on the hydrology,water quality and water ecology,and the relative theory,methods and models. However,theses researches can't reveal the ecohydrological process mechanism;furthermore, the studies on the ecohydrology are even weaker. The future topics on the function of ecohydrological on the water environment security regulation are as follows:①the mechanism of development and driving force of ecohydrological;②secondly,the spatial and temporal difference of ecological water requirement based on the ecohydrological process;③the response mechanism of water quality to the ecohydrological process in a basin;④the function of ecohydrological process on the ecological water storage;⑤the regulation on the ecohydrological process in land region near sea for the sea water quality security;⑥the eco-hydrological model based on modern geographical information system techniques;and⑦the ecohydrological decision and management based on the water environment security.