The invention discloses a multi-angle metal material machining polishing device. The device comprises a bottom plate, wherein a side plate is fixedly connected to the left side of the top of the bottom plate, a first reinforcing block is fixedly connected to the bottom of the right side of the side plate, the bottom of the first reinforcing block is fixedly connected with the top of the bottom plate, a top plate is fixedly connected to the top of the right side of the side plate, a second reinforcing block is fixedly connected to the left side of the bottom of the top plate, and the left sideof the second reinforcing block is fixedly connected with the right side of the side plate. According to the device, through mutual cooperation of a shell, a through opening, a rotating shaft, a rotating plate, a sliding rod, a reinforcing rib, a sliding block, a connecting block, a connecting plate, a connecting shaft, an adjusting plate, a threaded rod, a rotating rod and an adjusting bearing, apolishing angle of the metal material machining polishing device is convenient to adjust, a non-flat material can be quickly polished, a machining cost of a metal material is saved, a machining process of the metal material is accelerated, and great convenience is brought to a user.