This paper first describes the development and characteristics of mobile application in power system,and analyzes the security risks faced by clients,servers,data transmission and management.Then,aiming at the security characteristics of mobile clients,a security mechanism detection method is put forward from the perspective of application security protection,and the detection method is described in detail from two aspects of detection means and detection points.Finally,comprehensive static analysis and penetration test method,the APP security test was carried out.The test scheme and test method proposed in this paper can find the security risk in mobile application comprehensively and efficiently.It provides technical guidance for pre-line safety evaluation.