This article aims to study the effect of institutional change on economic growth from the Angle of the economic system .For quantitative system variables, this paper adopt the index that most scholars generally adopt: denationalization level, degree of marketization, the degree of opening to the outside world and the government's intervention in the financial.Through the study of national index in 1981 ~ 2013, using Cobb-Douglas production function model, this paper analyzes the factors’ influence on economic growth..Based on the above data, using software results and analyzes its economic meaning, and gives some suggestions.