Combining with the construction of Environmental Protection Information System for Jiangsu Province,the authors discussed some of the key technical problems in the integration of WebGIS and one-dimensional Water Quality Model.First,the paper expounded the methods and process of river section cutting,spatial data dispersing and resampling for the selected river,then mainly studied the integration methods of WebGIS and one -dimensional Water Quality Model and put forward the web -based visual expression methods about the results of model.Finally,the paper tried to realize the data sharing and water environmental model operating on different platforms.