In this paper, based on the main experience in the inherent risk management of securities companies in the other countries , the cause and form produced by the risk of securities companies are analysed. According to the theory of system engineering , a managerial train of thought for doing business of securities companies and management three locks are presented: the regulation, the process and the risk point,namely a viewpoint setting up a management system on institutions for the regulations , the process and the risk point.The results this paper concludes can be directly used for the reference by security companies in the practice for the risk prevention and the risk management.