Screw locking device for industrial robot

The utility model provides a screw locking device for an industrial robot, and belongs to the field of machining and manufacturing. The electric screwdriver comprises an electric screwdriver head and a screw supply device, the screw supply device is arranged below the electric screwdriver bit; the screw supply device comprises a magnetic guide rail and a plurality of screw assemblies. The screw assembly comprises a screw and an expansion sleeve used for being arranged at the tip end of the screw in a sleeving mode. The screw is further provided with a slotting end used for being in butt joint with the electric screwdriver head, and the diameter of the slotting end is the same as that of the expansion sleeve. One side of the magnetic guide rail has magnetic force, and each screw assembly slides on the magnetic guide rail through the slotting end on the screw assembly so as to move to the position below the electric screwdriver head. The expansion sleeve is arranged on the outer side of the screw, so that the t