The utility model relates to a scraping device which can remove the oxide layer at the outer surfaces of the ends of a pipe workpiece at one time, aiming at providing a polyethylene pipe scraper used to remove the oxide layer at the surface of the pipe, which is more convenient, quicker and more efficient and can ensure scraping quality. The polyethylene pipe scraper comprises a cutter and in addition a power device, a motion conversion device, and a cutter and pipe workpiece positioning device. The power device comprises a spanner and a screw leader, forming a screw transmission structure. The motion conversion device comprises a single thrust bearing and a push plate. The cutter and pipe workpiece positioning device comprises a supporting frame and a rubber sleeve. The spanner is sleeved at the end of the screw leader through a spanner hole, which matches with the spanner. The screw leader is connected with the supporting frame through guide screw threads. The push plate and the screw leader are fixed with a shaft-end shield cover through the single thrust bearing. The rubber sleeve is connected and fixed on the push plate through bolts, and the cutter is connected and fixed on the supporting frame through bolts. The polyethylene pipe scraper is simple in structure, convenient to use and effectively improves work efficiency and quality of the scraped surface of the pipe workpiece.