The invention discloses a
numerical control four-axis vertical milling
machine based on the wheel pushing angle distance of a relying key for adjusting a milling head groove. The
numerical control four-axis vertical milling
machine structurally comprises a milling head motor frame, an industrial control display, an anti-splashing baffle plate, a
machining groove table, a stepping motor, a key position adjusting device, a thick vertical frame plate and a square base. According to the
numerical control four-axis vertical milling
machine based on the wheel pushing angle distance of the relying key for adjusting the milling head groove, the
machining groove table is matched with the key position adjusting device, so that after the relying key is worn, emergency operation of temporary enduranceshort-time transmission operation is achieved, so that time is conveniently reserved for preparing a new relying key, and the
machining progress is not delayed; the material and thickness of a semicircular key ring plate are fully used, so that waste of part materials due to frequent replacement after preliminary wear is avoided; and then the machining groove table at the bottom of the bearing milling head motor frame is also adjusted by an angle distance adjusting plate, so that a press attaching angle distance adjustment effect of a pointer clamping moving plate with horizontal surface andvertical surface gear engaging is formed, the machining effect of the four-axis linkage three-dimensional coordinate milling machine with transverse double shafts and longitudinal double shafts is guaranteed, and the working efficiency of a machine table is guaranteed by fully using the adjusting performance of the relying key.