The utility model relates to a high -voltage switch field especially involves a high -voltage switch and machinery operating mechanism thereof. High -voltage switch include the switch body and with mechanical operating mechanism, mechanical operating mechanism includes power output shaft, power output shaft is last to be equipped with at least a pair of reverse spiral -shaped spring, the spiral -shaped spring divide into separating brake spring and combined floodgate spring, when the contact of switch body was located the stroke middle section, separating brake spring and combined floodgate spring were all at free state, when the contact of switch body was located the separating brake position, the separating brake spring was in the cinching state, and the combined floodgate spring is in the loose winding state, when the contact of switch body was located the combined floodgate position, the separating brake spring was in the loose winding state, and the combined floodgate spring is in the cinching state. At the in -process of switch body divide -shut brake, the spiral -shaped spring can provide the helping hand for the action of switch body at the action initial stage, and in the action later stage, the spiral -shaped spring then can play the speed reduction cushioning effect, has solved high, the big problem of vibration of the terminal noise of present high -voltage switch motion effectively.