With the gradual advancement of the State Grid power Internet of Things (IoT), the edge-computing framework as its core support has gradually become a research hot topic. This article firstly summarizes the existing research work on the IoT and edge-computing framework. Secondly, by analyzing the key requirements of the power IoT in business scenarios, edge computing and information security; a way to adapt to the power SG-Edge is proposed, which is a trusted edge-computing framework for the IoT. Then, key technical methods such as hardware trusted boot and dynamic measurement of software behavior are proposed to meet the key challenges of the trusted protection of the edge framework. Finally, the SG-Edge is fully evaluated from the aspects of business adaptability and security, and the possible future research challenges are prospected.