Power system vacuum circuit breaker maintenance platform

The invention provides a power system vacuum circuit breaker maintenance platform. The power system vacuum circuit breaker maintenance platform comprises a frame, a longitudinal beam arranged on the frame, a carrying platform connected with the longitudinal beam in a sliding mode, an operation box arranged on the longitudinal beam, a winding roller arranged in the operation box, an on-beam hangingwheel arranged at the top end of the longitudinal beam, a carrying hanging wheel arranged on the carrying platform, a wire disengaging preventing device arranged on the operation box, a transverse positioning device arranged on the frame, and a longitudinal positioning device arranged on the frame. Once the carrying platform touches the frame, and a crank is reversely shaken continuously, a steelwire rope is loosened; a ratchet wheel and a pawl are locked under the action of a tension spring, so that the crank cannot be continuously reversely shaken, and therefore, maintenance vehicle faultscaused by wire disengageme