Dispersive liquid-liquid microextraction（DLLME） is novel microextraction technique with a great potential in sample pretreatment,which has been increasingly used for preconcentration of diverse analytes.DLLME enjoys the advantages of simplicity,rapidity,low cost,high recovery and enrichment factor,and environmental benignity.Recently,as a viable sample-preparation approach,DLLME has been receiving rising concerns and achieving wide applications.In this paper,the research progress and applications of DLLME in preconcentration and separation of pollutants in different media are reviewed.