Urbanization is a worldwide historical process. Although China's urbanization started late,it is fast,large in scale,high in resource and energy consumption,and leads to a series of water and thermal environment problems. This paper systematically sorted out the ecological environment challenges faced by Chinese cities under the dual pressures of global climate change and urbanization,such as water shortages and water pollution,increasingly serious urban heat island issues and ecological hydrological disasters. It proposed to solve the problem of urban ecological environment with the theory and means of urban ecohydrology,improve the quality of urbanization in China,and realize livable cities.