The cutting process of any material can be made to any material at any time (except for water cutting, other cutting methods will be limited by the variety of material); no heat and harmful substances are produced when cutting, and the material has no heat effect (cold state cutting). After cutting, it does not need or is easy to add two times, safety, environmental protection, low cost, and speed. Quick and efficient, it can realize the cutting of arbitrary curves, convenient and flexible, and has wide use. Water cutting is the most powerful cutting technology at present.