Water jet cutting, ultra-high pressure water jet cutting machine is to pass ordinary water through an ultra-high pressure pressurizer, pressurize the water to 3000bar, and then pass through a water nozzle with a channel diameter of 0.3mm to generate a water jet of about 3 times the speed of sound, Under the control of the computer, it can easily cut soft materials of any shape, such as paper, sponge, fiber, etc. If adding sand to increase its cutting force, almost any material can be cut.