With the completion of the Three Gorges Project, the problems of economic development in the Three Gorges Reservoir area attract high attention of state leaders, while accounting for the vast majority of the Three Gorges Reservoir area, economic development of Chongqing reservoir area is significant to the upper reaches of the Yangtze River.〖BP)〗Selecting 17 counties of Wanzhou, Yunyang, Jiangjin, etc. in Chongqing as the research object, according to the data issued by Chongqing Statistical Yearbook, this paper selects representative principal components by principal component analysis and clusters the scores of the principal components. The conclusion shows that the reservoir area of Chongqing is divided into two principal components as Chongqing city and Wanzhou, whose radiation effect is relatively obvious. Finally suggestions for the economic development of Chongqing Reservoir area are put forward.