Abstract: Cloud point extraction (CPE) which is friendly to environment is a kind of liquid-liquid extraction developed extensively in these years.CPE is simpler,less toxic and much cheaper than the conventional methods,such as liquid-liquid extraction,solid phase extraction,soxhlet extraction,and so on.It is used successfully in the preparation of metals and purification of proteins.The principle and types of CPE (cloud point extraction induced by temperature,coacervation extraction,mixed micellar-mediated extraction) were introduced,and its potential application in pesticide analysis were analyzed.