Laser cutting device with laser head convenient to replace

The laser cutting device comprises a machining table, the front side and the rear side of the left portion of the lower end of the machining table and the front side and the rear side of the right portion of the lower end of the machining table are each fixedly provided with a supporting leg, and the middles of the opposite faces of the two sets of supporting legs are each fixedly provided with a storage box; a protective cover is fixedly installed at the upper end of the machining table, a spraying device is arranged in the middle of the upper end of the protective cover, a concentric-square-shaped frame is fixedly installed in the middle of an inner cavity of the protective cover, a laser cutting mechanism is arranged in an inner cavity of the concentric-square-shaped frame, and a movable device is arranged in an inner cavity of the machining table. According to the laser cutting device with the laser head convenient to replace, pressure is applied to clear water when the water pump works, so that the clear