Abstract: High-speed power line communication technology is widely used in the fields of smart grid and intelligent lighting. The real-time measurement and analysis of the unique communication channel characteristics of power line is of great significance to the promotion of power line carrier communication technology. In this paper, a design method of integrated channel characteristic measurement system is proposed, which uses the power line carrier communication module to highly integrate the functions of real-time measurement and data acquisition, analysis and processing of channel characteristics such as channel attenuation and noise power, so as to get rid of the dependence on special measurement equipment. This solution can effectively assist the power line carrier communication network for online diagnosis and provide a strong support for improving the communication quality.