The utility model relates to the technical field of
nail polish, and discloses a
nail polish bottle cap screwing device which comprises a base, a mounting groove and a mounting plate. By arranging the base, the mounting groove, the mounting plate, the hydraulic rod, the fixing device, the rotating mechanism, the clamping mechanism and the vertical rod, firstly, a
bottle body is mounted on the fixing mechanism, the fixing device is opened, a top transmission wheel drives a lead screw to rotate, the lead screw drives the fixing plate to move through threaded connection, and the
bottle body is fixed through the fixing plate; a
bottle cap is installed on a clamping mechanism, the
bottle cap is clamped through a moving plate, a rotating mechanism is opened, a front side gear drives a transmission frame to rotate, the transmission frame drives the
bottle cap to rotate, a hydraulic rod is opened, the hydraulic rod drives the bottle cap to move, and the bottle cap is screwed to a bottle body. And when the bottle cap is manually screwed for a long time, hands are tired, so that the production efficiency is reduced.