Four new bifunctional light stabilizers (Ⅱa, Ⅱb,Ⅱc,Ⅱd)were synthesized from the intermediates 2-(2′,4′-dihydroxylphenyl)-2H- benzotriazole and 5-chloro-2-(2′,4′-dihydroxylphenyl)-2H- benzotriazole by the reactions of etherization with ethyl bromoacetate and then esterification with 2,2,6,6,-tetramethylpiperidine or 1,2,2,6,6-pentamethylpiperidine.The yields were 57.5%、59.1%、56.0% and 54.4%,respectively. The structures were characterized by means of 1HNMR and MS.Their ultraviolet absorptions were investigated .the results show that they have stong absorption in 270-400nm.The maximum molar absorption coefficients(εmax?04 )was 2.3610,2.5697,2.4238 and 2.5342 respectivly. Two intermediates were prepared from resorcinol and o-nitroaniline or o-nitro-p-chloroaniline.