Edge computing is considered to be one of the key technologies in providing 5G low latency services. Benefi tted from the computing and storage close to the end users

mobile edge computing shall be able to offer runtime environment and resource to latency-sensitive applications

and shall also provide local service processing and fl exible routing. Meanwhile

mobile edge computing also introduced risks

such as unsafe environment

weak core control

mobile edge computing suffer from unauthorized access and sensitive data leakage

（D）DoS attacks. This paper introduces the concept and application scenario of edge computing

analyzes security threats

suggests a security protection framework and security protection solutions for mobile edge computing.