Fifteen N-substituted compounds of O,O-dimethyl S-(carbamoylmethyl) phosphorodithioate were prepared by two methods A and B.Method A was based on the reaction of O,O-dimethyl phosphorodithioate and N-substituted α-choroacetylamide in the presence of sodium carbonate in acetone as solvent.In method B the reaction of the sodium salt of the O,O-dimethyl phosphorodithioate and N-substituted α-chloroacetylamide was carried out.The structural formulas,melting points,elementary analyses and the solvents for recrystallization of these compounds were listed in the Table (in Chinese text).