Abstract: The Three Gorges project is attracting worldwide attention. The migrating population of the Three Gorges reservoir is about 1.2 million which is rare in the present world. However, the reservoir area of the Three Gorges project lies in a medium-low mountains, hills and gorges with complicated geological conditions and limited capacity of geological environment. Various geological hazards happen seriously in this area. As the growth of population and development of 1ocal economy, many problems of environmental geology will be worse. Lacking of land resources and water resource, intensifying of landslide and rock collapse, caving and reconstruction of reservoir bank, and karst collapse are the primary problems in construction relocation cities. Based on the practical studies on the transfer and reconstruction of cities and towns in the Three Gorges reservoir area, a comprehensive evaluation indexes system is established, which includes individual geologic body quality, the synthetical disaster of city geological environment, water pollution level, natural, resources superiority, the economic loss-profit degree of geological environment and the carrying capacity of cities. With the method of duster analysis, the geological environment quality of nine new city sites is analyzed and compared comprehensively. Three different geologica1 environment grades can be divided among the new city sites. Comparatively, the geological environment quality of new city sites in Zigui and Yunyang is better than that in Fengjie, Badong and Zhongxian. The quality of the new city sites in Wushan, Wanxian, Fengdu and Fuling is the worst. The grades of the gological environment quality reflect the coordination between the city sites environment and the human activity. The synthetical environment quality of the new city sites is affected by many factors, in which individual geologic body quality, the synthetical disaster of city geological environment and natural resources superiority are crucia1. During constructions and development of the new cities in the reservoir area, the advantages of environment conditions should be used fully and the land resources should be used rationally. The monitor net of geological hazards in the reservoir area should be established and strengthened. The loss cause by geological hazards should be minimized. Under the guiding of geological engineering theory, construction of the new cities must act in accordance with the prevention and control of geological hazards. The human-activity-induced geological hazards must be avoided as far as possible.