A new lower pressure water jet cutter has been invented, which adopts the technology of premixed abrasive jet and computer numerical control (CNC). A series of technical problems had been solved such as abrasive screen classification, abrasive tank filling, abrasive consistency regulation, valve group sequence control, etc, which are essential in the application of this technique. The structure, working principles, main technological parameters and practical application of the cutter are introduced in this paper. Experimental results show that the water jet cutter can cut steal, glass and other materials. It is characterized by its high efficiency, low specific power consumption and fine automation level. Therefore it is a new type of cold cutting machines.