Abstract:Pretreatment processes play an important role in organic-tin speciation analysis．Organic-tin species extractive methods including solvent extraction （SE），accelerated solvent extraction （ASE），pressurized liquid extraction（PLE），solid phase extraction（SPE），solid phase micro-extraction（SPEM），supercritical fluid extrac－ tion（SFE），ultrasonic extraction（UE），microwave assisted extraction（MAE） and the pretreatment methods for food were summarized in this paper. Because there were many kinds of organic-tin compounds， the physical and chemical properties are different. So there was great difficulty in the extraction. The new trends of pretreatment for trace and ultra trace of organic-tin species in the future should focus on satisfying the automatic requirement with simple，rapid and environmental friendly characteristics，and be capable of integrating the different extrac－ tion techniques or new pretreatment methods of direct and on-line coupling with specific organic-tin species de－ tection.