Disc brake assembly machining device

The utility model belongs to the technical field of disc brake machining, particularly relates to a disc brake assembly machining device, and aims to solve the problems that the size of an existing movable clamping jaw cannot be changed, and the existing movable clamping jaw can only be suitable for clamping a disc brake with one size, so that the use range is reduced; in order to solve the problems that in the prior art, a disc brake is in a hollow disc shape, and inclination is prone to occurring when the inner wall is not limited and clamped, the following scheme is provided, the disc brake device comprises a workbench and a disc brake piece, a supporting column is fixedly connected to the top of the workbench, and the disc brake piece is arranged on the outer wall of the supporting column in a sleeving mode; according to the disc brake pad polishing device, due to the fact that the conical bosses are arranged, disc brake pads of different sizes can be conveniently positioned, deformation caused by the fac