Abstract: Micro-institutional circum stances can mipede or promote enterprise development in the process of economic development.Among many factors which cause a regional economy to be under developed,the lag of institutional construction may be most essential. As for the economy take off of the under developed regions,institutional construction is the key point prior to technological innovation.We should take the optimization of micro-institutional circum stances for enterprise development as the first and long-run drive of the economic development.