Clamp tool for milling cutter

The utility model provides a clamp tool for a milling cutter. The clamp tool for the milling cutter comprises a sealing cylinder and the milling cutter, the thread strip is arranged outside the milling cutter; and the connecting cylinder is fixedly connected to the interior of the sealing cylinder, a communicating hole is formed in the connecting cylinder, a plurality of second water injection grooves are formed in the exterior of the connecting cylinder, and internal threads are formed in the inner wall of the connecting cylinder. According to the clamp tool for the milling cutter, a water source is conducted and discharged through the second water injection grooves, the machining contact face of the milling cutter is directly flushed, and therefore an external spray head flushing mode is replaced, the water source can conduct cooling flushing on the cutting and milling position more comprehensively, the arrangement of a spray head is omitted, and the machining efficiency is improved. The milling cutter clam