Abstract: It’s helpful to realize an efficient migration management for Shifosi Reservoir using three dimension simulation flooding analysis system. The system was established using C++ program on the basis of FLTK and OpenGL GIS. In this system, the DEM (digital elevation model) datum were extracted from 1︰2 000 topographic map of Shifosi reservoir in Liaoning Province according to GIS technology, remote sensing technology and virtual geographical environment, and three dimension simulation analysis of flooding were realized by overlaying analysis based on remote sensing data of land classification, the administrative divisions, the remote sensing images and DEM datum. This system realized the multiple functions as three dimension roaming in the reservoir area, three dimension profile analysis, land flooding analysis inquiries, presentations for flooding analysis, etc.. Its user-interface was friendly and convenient, and easy to be operated and safeguarded. The system has been applied in Shifosi Reservoir, and it provides the decision-making support for the land compensation of the reservoir of immigrants and helps to achieve the efficient migration management of migration reservoir.