Gear hobbing machine

The invention provides a gear hobbing machine, and belongs to the technical field of machining equipment. The gear hobbing machine solves the problem that copper powder is inconvenient to clean. The gear hobbing machine comprises a top plate and a rotating disc assembly arranged on the top plate. A matching plate is arranged on the top plate and located on the side of the rotating disc assembly in parallel, the end of the matching plate extends to the rotating disc assembly, and a circular arc face is arranged at the end of the matching plate. A disc is connected to the rotating disc assembly, teeth which are continuously distributed are arranged on the peripheral face of the disc, and a forming channel is formed between the peripheral face of the disc and the circular arc face. A cavity is formed between the rotating disc assembly and the top plate, a plurality of powder leaking holes which communicate with the cavity are formed in the rotating disc assembly and located under the edge of the disc, brushes ar