The invention relates to an acoustic-electric combined positioning method of switch cabinet local discharge fault positions and aims to solve the problems that existing ultrasonic positioning methods are low in positioning precision and processing speed. According to the technical scheme, the method is characterized in that a TEV sensor and at least three ultrasonic sensors are mounted at different positions on the surface of a switch cabinet, the sensors are used to detect the ultra-high-frequency signals and ultrasonic signals generated by switch cabinet local discharge, a terminal computer acquires the output signals of the sensors through a multi-channel data collecting card, and the position coordinates of local discharge points are calculated according to the time difference of the ultrasonic signals collected by the ultrasonic sensors and the ultra-high-frequency signals collected by the TEV sensor. The method has the advantages that the positions of the local discharge points are judged according to the ultrasonic signals and the ultra-high-frequency signals generated by local discharge; compared with a traditional acoustic-acoustic method, the method is high in positioning precision, fast in processing, and capable of effectively increasing the inspection efficiency of switch cabinets.