Abstract: Mobile intelligent terminals used in electrical systems store much information,including user identity,operation data of electricity, management information,and etc, which makes them have a great value of being attacked. . As the world's most widely used mobile operating system, Android is applied in a large number of applications within the area of power grid. However, the openness (third-party developers) has provided the possibility to vulnerabilities, malicious behaviors and other types of attacks along with the powerful functionality and flexibility. This paper,based on the Android system security model and existing security threats research, summarizez security threats in Android security, including remote and local attacks, privacy theft, hijacking and remote control techniques. And then this paper provides a corresponding solution by adding malicious code detection module and operating system reinforcement which can help us improve the security of grid management system.