Abstract: The mechanism of interaction between laser and liquid material has been persistently received much attention in a variety of fields,such as medicine,industry.This interaction is a very complex one,accompanying optical,acoustic,mechanical effect and so on.In recent years,study about the laser-induced optical breakdown mechanism,shock wave emission and cavitation bubble dynamics,not only in theory,but also by experiments,has developed quickly.This paper mainly presents situation,development and some unsolved problems about the interactional mechanism.