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This utility model relates to the field of laser processing equipment, and more particularly to a three-dimensional laser metal cutting machine, including a machine tool and air pipes. The machine tool is equipped with a gantry that moves back and forth. A laser cutter that moves left and right is mounted on the front side of the gantry. An air inlet hood is connected to the front side of the gantry, and a dust collector is mounted on the top of the gantry. One end of the air pipe is connected to the dust collector, and the other end is connected to the air inlet hood. A dual-axis motor is mounted in the middle of the air inlet hood, with drive shafts connected to both ends. A guide fan is mounted on the drive shaft, and the air outlet direction of the guide fan is aligned with the air pipe port. The gantry is equipped with protective components to block cutting debris. Through the linkage of a baffle and a stepper motor, the baffle swings vertically downward to form a semi-enclosed space, forcibly guiding the dust-laden exhaust gas into the air inlet hood. Combined with the controllable gap at the bottom of the baffle to draw in external cold air, this achieves efficient capture of exhaust gas and real-time cooling of the cutting area, curbing the spread of pollutants at the source.