To examine and analyze the relationship between the corporate governance and long run performances of private placement, we select return on assets, return on equity, and stock return rates as independent variables. The ordinary least squares is applied and the companies of private placement from 2007 to 2010 are used as research examples. The results are as follows. Firstly, return on assets are positively related with the setting of supervisors or audit committee (SUP), the compensations to general managers (M_COM), the ownership of inside shareholders (INOWN) and the ownership of institutional shareholders (INSHOLD). Secondly, return on equity is positively related with setting of supervisors or audit committee (SUP) and the compensations to general managers (M_COM). Finally, stock rate of return is positively related with the duality of CEO and chairman of the board (DUAL). When a company has mature corporate governance, then private placement is positively correlated to a company's long run performance.