Metal nut tapping machine facilitating material changing and fixing

The utility model relates to the technical field of nut tapping machines, and discloses a metal nut tapping machine convenient for material changing and fixing, the technical scheme is that the metal nut tapping machine comprises a base, a working head and a fixing device, the surface of the base is fixedly connected with an operator, the working head is arranged above the base, and the fixing device is arranged above the working head. The fixing device is arranged on the surface of the base, the fixing device comprises a fixing block, the fixing block is fixedly connected with the surface of the base, by arranging the fixing device, a nut can be conveniently clamped and fixed, and the situation that when equipment is fixed, the equipment is fixed through cooperation of a bolt and a pressing plate, and when the equipment needs to be replaced, the bolt needs to be manually twisted is avoided; and the situation that operation is troublesome exists is avoided, the material changing speed of the equipment is redu