Two novel N-dichloroacetyl oxazolidines were synthesized with a simple,mild and convenient method in good yields. The compounds were characterized by IR,1H NMR and elemental analysis. The preliminary biological test show that the compounds protected maize against injure by chlorsulfuron to some extent. The novel combinations of two novel N-dichloroacetyl oxazolidines were synthesized with a simple, mild and convenient method in good yields. The compounds were characterized by IR, 1H NMR and elemental analysis. The preliminary biological test show that the compounds protected maize against injure by chlorsulfuron to some extent .