The paper constructs an econometric model of economic growth, basing on the total quantity description of economic growth of Chongqing. Using the section data, time sequence data and panel data of Chongqing from 1952, especially from 1978,the authors analyze the factors of the economic growth of Chongqing, and investigate influence mechanisms and contributions to economic growth which are made by technology progress, physical capital, human capital, the change of industrial structure and so on. Then they test whether the district and county economy of Chongqing converges, and obtain a result that it has a positive relation.