Gear hobbing machine

The invention provides a gear hobbing machine, and belongs to the technical field of machining equipment. The problem of poor applicability is solved. The gear hobbing machine comprises a top plate, a transmission shaft which is rotatably arranged on the top plate and a rotary table which is circumferentially fixed to the transmission shaft, a matching plate is arranged on a portion, on the side part of the rotary table, of the top plate, an arc face is arranged at the end part of the matching plate, a boss is arranged on the upper side surface of the rotary table, a disc concentric with the rotary table is arranged on the boss, continuously distributed teeth are arranged on the peripheral surface of the disc, the height of the matching plate is higher than that of the boss, a forming channel is formed between the peripheral face of the disc and the arc face, and the disc is fixed to the transmission shaft in the circumferential direction, can slide along the transmission shaft and can be positioned after sli