The invention relates to a double-screw-rod automatic plastic cup superimposition device, which comprises an upper conveying belt, a lower conveying belt and a star wheel combination, wherein the back end of the upper conveying belt is connected with an upper screw rod, a guide tube is arranged outside the upper conveying belt, the back end of the lower conveying belt is connected with one end of a discharging conveying belt, a lower screw is arranged on the discharging conveying belt, the other end of the discharging conveying belt is connected with the star wheel combination, the star wheel combination consists of two star wheels, each star wheel comprises a star wheel power shaft, an upper star wheel disc, a lower star wheel disc and a shaft sleeve, the upper star wheel disc and the lower star wheel disc are arranged on each star power shaft, and each shaft sleeve is arranged between the corresponding upper star wheel disc and the corresponding lower star wheel disc. The double-screw-rod automatic plastic cup superimposition device has the advantages that through the design of the screw rods, plastic cups are regularly ranged, the plastic cups realize reverse rotation or superimposition through the effect of the guide tube, the automation degree is greatly improved, meanwhile, through the effect of the star wheels, the ranging of the plastic cups is more accurate when the plastic cups enter a next link, the positioning is more precise, and the automatic packaging in the next step can be favorably completed.