With the tightening monetary policy as the angle of view，this paper，using the financial data of 2007—2011 listed corporations，makes an analysis of the influence of internal control quality and property rights on enterprises to obtain commercial credit.The results show that，in the tightening of monetary policy period，commercial credit can be used as an alternative financing method and enterprises with high quality internal control can obtain more commercial credit.Compared with the nonstateowned enterprises，stateowned enterprises with high quality internal control help to obtain commercial credit.