Transport of nonaqueous phase liquids (NAPLs) in soil and other porous media would pose a great threat to the environment of soil and underground water.Recent advancement in the study on retention characteristics,and permeation features of NAPLs,mathematic models of their transport and experimental technology and methods are reviewed.on such a basis direction and trend of the research on mechanism of NAPLs transport in porous media,and key issues for further study are also presented.