Liquid-assisted laser machining is a composite manufacturing technology. Depending on its unique characteristics and advantages, it already has been received widely attention and applications in the field of manufacturing. The technology has become a hot spot in the interaction between laser and liquid medium. In this paper, the research status of shock wave and high-speed micro-jet pressure in liquid-assisted laser process is re-viewed. The mechanism, the basic characteristics of pressure and the factors that affect the pressure in the pro-cess of liquid-assisted laser machining are resumed. The research method and the latest progress of the pres-sure phenomenon in the laser wet machining are mainly introduced. The advantages and disadvantages of these pressure detection methods are summarized. Finally, the applications of liquid-assisted laser machining in related fields are introduced and the prospects of this technology are summarized.