Abstract: Sedimentati on is one important cause of river flooding.Many mathematical simulation model systems for this process have been successfully established.These model system sare very powerful in simulating calculation,but much more weaker in visualization of process data and further spatial analysis.Current GISs are very strong in visualization and spatial analysis.So by integrating with GIS,it is hopeful to resolve this problem.In this paper,a visualized analysing system of sedimentation process is studied and implemented.