The utility model provides a three-dimensional composite carton scratching blade capable of improving the cyclic utilization rate of cartons, which consists of a tool bit and a tool handle, the tool bit consists of a lower blade and an upper blade, the lower blade comprises a tool plane, and transverse cutting edges are arranged on the left and right sides of the tool plane; the upper blade is vertically arranged on the cutter plane and comprises longitudinal cutting edges perpendicular to the left side and the right side of the cutter plane and a cutter ridge parallel to the cutter plane, anda cutter handle is arranged on the cutter ridge. The lower blade is used for cutting off the adhesive tape at the intersection of the side face of the carton and the carton sealing opening face of the carton. And then the upper tool bit is used for scratching the adhesive tape in the middle of the carton sealing opening surface of the carton, and the adhesive tape of the carton can be scratched at one station. According to the three-dimensional composite carton scratching blade, in the carton scratching process, a carton is not prone to being damaged, the carton is kept intact, and a paper phase can be reused and recycled.