The methods to synthesize sucralose had investigated in this paper, which involve esterification of Organo-tin, acidation, and chlorination.The effects of the ratio of DBTO and sucrose on the reaction were investigated.The optimal reaction conditions were obtained as follows: n(DBTO):n(sucrose) = 1.01-1.03.Moreover, in order to decrease the byproduct and keep stable reaction, three levels of temperature in process of chlorination were adopt.This method is suitable for the preparation of sucralose in industrial seal.