The utility model discloses a cutting device for tectorial membrane iron, its structure includes: power protective outer cover, aircraft nose, control system, rolling bearing, fixed horizontal platform, cutting device, supporting plane board, board base, sliding block, connecting frame, base supporting legs, louvre, power pipe, power supply box, power cord, control panel, liquid crystal display, work pilot lamp, sliding panel, be equipped with the power cord in the power protective outer cover, fixed horizontal bench is equipped with control system, aircraft nose and sliding panel swing joint, the aircraft nose passes through rolling bearing with cutting device and is connected, the utility model provides a cutting device for tectorial membrane iron is equipped with cutting device, adopts foundry technology, and the performance is more stable, adopts the absorbing form, avoids under the high -speed motion condition, and laser cutting equipment produces resonance, machining precision when having guaranteed high speed cutting, thus can gather vice cutting laser in the main speed that has increased soon processing on cutting laser moreover.