The utility model provides a vertical screw elevator which comprises two tubular protection covers which are vertically arranged side by side, wherein guide grooves are oppositely formed in side walls of the two protection covers; driving shafts are arranged in the protection covers, helical blades are arranged on the driving shafts, top ends of the two protection covers are connected through a cross beam, and a transmission gear driven by a power source is arranged on the cross beam and drives the two driving shafts to rotate in the same direction through a power transmission mechanism; a bearing shaft with two ends extending into the two protection covers is arranged between the two protection covers, lifting wheels are mounted at two ends of the bearing shaft respectively and located on upward blade surfaces of the helical blades, and a car is arranged on the bearing shaft. The vertical screw elevator can replace an inclined elevator part of an overpass, the urban space and the cost are saved, meanwhile, the traffic function and the traffic capacity are enhanced, the vertical transport manner is adopted, and walking distances and time of pedestrians are shortened.