Abstract: The Hydrolysis of 2,4,5,6-tetrachloro-1,3-Benzenedicarbonitrile and its two derivatives containing fluorine were researched.In this study, the routines 1a to 2a and 1b to 2b were new ones,and a new compound 2b was prepared.The structures of the compounds obtained were confirmed by IR,MS,NMR datas.