Carbon javelin machining device and machining method

The invention discloses a carbon javelin machining device and method, and belongs to the technical field of grinding machining. The carbon javelin machining device comprises a clamping and positioning mechanism, the clamping and positioning mechanism is arranged on a sliding seat, one end of a workpiece is clamped on the clamping and positioning mechanism, the other end of the workpiece abuts against a tip arranged on a fixed seat, and a rotating motor for driving the clamping and positioning mechanism to rotate is arranged on the sliding seat. The grinding mechanism is arranged outside the workpiece in a sleeving mode to grind the outer surface of the workpiece, the grinding mechanism is arranged on the sliding plate, a sliding structure for driving the sliding plate to slide on the base is arranged on the base, and a reciprocating structure for driving the grinding mechanism to slide on the workpiece in a reciprocating mode is arranged on the sliding plate. And the clamping mechanism is arranged on the slid