Abstract: 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 reviewed. The mechanism, the basic characteristics of pressure and the factors that affect the pressure in the process of liquid-assisted laser machining are resumed. The research method and the latest progress of the pressure 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.