Machining device for rotary body workpiece

The utility model provides a machining device for a rotary body workpiece, and relates to the technical field of workpiece post-machining. The machining device comprises a base, a workpiece fixing assembly, a cutter fixing assembly, a cutter fixing assembly and a control assembly. The workpiece fixing assembly can be rotationally arranged on the base in the preset direction and used for fixing an external workpiece. The tool fixing assembly comprises a first movable seat, a second movable seat, a tool clamping piece and a first driving piece, wherein the first movable seat is arranged on the base in the mode that the first movable seat can move in the preset direction, the second movable seat is arranged on the first movable seat in the mode that the second movable seat can move in the preset direction, the tool clamping piece is rotationally arranged on the second movable seat, and the first driving piece is used for driving the tool clamping piece to rotate. An external cutter is fixed. The first driving pi