The embodiment of the invention discloses a six-phase motor operating mechanism for a high-voltage circuit-breaker. Two windings of a six-phase motor are connected to two independent driving inverters, the two windings are mutually back-up, the two inverters are mutually back-up, when one inverter stops working due to a fault, the other inverter can still finish switching closing operation, with respect to a motor driving ability choice, when one winding stops working due to the fault, the left winding and the inverter of the winding can still drive a high-voltage circuit-breaker main shaft to finish the switching closing operation, and the system reliability is improved.