High-voltage isolation switch speed reducer

The utility model provides a high-voltage isolation switch speed reducer, and belongs to the technical field of machinery. The problem that an existing speed reducer is large in size is solved. The high-voltage isolation switch speed reducer comprises a box body, an input shaft, an output shaft and a transmission shaft, the input shaft, the output shaft and the transmission shaft are arranged in the box body, the two ends of the output shaft extend out of the box body, and the output shaft is vertically arranged; the input shaft is horizontally arranged on the right side of the output shaft, and the front end of the input shaft extends out of the box; the transmission shaft is horizontally arranged, and the input shaft and the output shaft are both perpendicular to the transmission shaft. An input worm is arranged at the rear end of the input shaft, a small worm gear meshed with the input worm is vertically fixed on the transmission shaft, an output worm is arranged at the left end of the transmission shaft,