The invention belongs to the technical field of gear machining, and discloses a tool rest for gear machining. The tool rest comprises a first positioning plate, a second positioning plate, a first positioning rod, a second positioning rod, a supporting plate, a first fixing plate and a second fixing plate. The second positioning plate is provided with the first positioning rod and the second positioning rod, and one end of the second positioning plate is connected with the first positioning plate. The supporting plate is arranged below the second positioning plate. The first fixing plate and the second fixing plate are arranged on the supporting plate. The tool rest for gear machining has the following advantages that when gears are finely machined, two gear blanks can be machined at a time, the double faces of each gear are machined simultaneously, and work efficiency is improved; secondly, the dimension errors of machined finished products are small, the percent of pass of the products is further increased, raw materials are saved, and production cost investment of enterprises is reduced; meanwhile, the tool rest is low in production cost, convenient to maintain and easy to popularize.