In order to evaluate the safety of the electrical system of garbage incineration power generation project, the dangerous and harmful factors of the main components of the electrical system such as transformer, distribution device, cable, relay protection device and DC system are analyzed. There are 6 safety hidden troubles in the electric system by using the method of safety check table. By using the fault tree analysis method, the factors causing the electric shock accidents are analyzed and the effective paths of preventing fault are put forward. The operational safety of the electrical system is evaluated through the risk analysis method of the operation condition. The security measures are taken from three aspects, such as preventing electric shock, ensuring power supply and distribution safety, preventing electrical misoperation and so on. Taking the specific safety technical measures, the electric system of MSW incineration power generation project is safe and reliable. This work is supported by Jiangsu Education Science "13th Five-Year" Project Planning (No. D/2016/01/91).