The invention discloses a profiling device for a friction wheel circular arc camber and a use method of the profiling device, wherein machining accuracy and production efficiency are obviously improved, labor intensity is greatly lowered, production cost is greatly reduced, market benefits are improved, lots of energy and time are saved, and application and popularization are convenient. The profiling device is composed of a profiling plate, a roller arc-shaped groove, template bolts, template screws, bridge pressing plates, a roller shaft, a roller, a middle support connecting plate, connecting plate screw holes, a large supporting plate, large supporting plate guide rails, a guide rail sizing block, longitudinal guide rails, a small supporting plate guide rail and a small supporting plate frame. The profiling device is characterized in that the guide rail sizing block is arranged between the two longitudinal guide rails of a lathe, one bridge pressing plate is correspondingly arranged on the guide rail sizing block, the large supporting plate guide rails are arranged at the two ends of the bridge pressing plate, the large supporting plate is arranged on the large supporting plate guide rails, the small supporting plate guide rail is arranged on one side of the large supporting plate, the small supporting plate frame is arranged on the small supporting plate guide rail, the profiling plate is arranged on one side of the small supporting plate guide rail, and the other two bridge pressing plates are arranged on the two sides of the profiling plate.