This paper introduces the traditional technology and several new methods of separation and purification of dimethyldichlorosilane,which includes not only physical separation,such as selective adsorption,extractive distillation,but also chemical separation,such as acylation, alcoholysis,selective crystallization and disproportionation method.Meanwhile,a comprehensive comparison of the advantages and disadvantages is made among all the methods.Also the future industrial development tendency on the separation ...