Jacking machining self-cooling cutter

The utility model discloses a self-cooling cutter for trepanning, which relates to the technical field of trepanning and comprises a cutter body. The cutter body is cylindrical, a cutter head is arranged at one end of the cutter body, a flow channel is formed in the cutter head, a plurality of nozzles are arranged on the cutter head, and the nozzles are all connected with the flow channel; an annular pipeline is arranged on the side, close to the tool bit, of the tool body, a plurality of high-pressure spraying pipelines are arranged in the circumferential direction of the tool body, one ends of the high-pressure spraying pipelines are connected with the flow channel, the other ends of the high-pressure spraying pipelines are connected with the annular pipeline, a spiral cooling pipeline for cooling liquid to be led in is arranged on the tool body, and one end of the spiral cooling pipeline is connected with the annular pipeline. The technical problem that the cooling effect is poor due to the fact that the u