The utility model relates to a machining lathe, especially a processing is closed and is cast combinationtype miller that mills out shift fork. Processing is closed and is cast combinationtype millerthat mills out shift fork is including intermediate base, wing base, stand, mechanical slide unit, milling unit head, cutter arbor, uide bushing, the anchor clamps body, characterized by intermediatebase on the mechanical slide unit has, the top of mechanical slide unit is equipped with milling unit head, cutter arbor, uide bushing, the motor is connected to the milling unit head, the motor drives the rotatory work of milling unit head like this, the milling unit head is connected with the cutter arbor, is equipped with a plurality of carbide on the cutter arbor and holds milling cutter, theother end of cutter arbor is worn in the uide bushing, still be equipped with the anchor clamps body on the mechanical slide unit. Have simple structure, be fit for the same closing of mass productionto cast the advantage of milling out the shift fork.