The present study has been carried out with a view to show the properties of poly(styrene-butadiene-4-vinylpyridine) triblcck copolymer irradiated by ,60,Co gamma-ray. The experiments reported here have indicated that the content of gel in polymer is above 90% when irradiation dose is 10,5, Gy.Meanwhile, FTIR spectra of copolymer by irradiated confirm the double bonds in polybutadiene domain are disappeared and TEM spectra of copolymer before and after irradiation reveal the morphology of copolymer dose not effected by irradiation.The research has been done demonstrates the Poly(styrene-butadiene-4-vinylpyridine) triblock copolymer irradiated by gamma-ray have advanced properties to withstand chemical agents, strong acid and alkali. On the other hand, comparing with the unirradiated polymer, the polymor irradiated by gamma-ray exhibits higher stress and lower strain. The elastica modulus of polymer irradiated by gamma-ray keeps unchange from 0 to 60℃. From this experiments one came to realize poly(styrene-butadiene-4-vinylpyridine) triblock copolymer irradiated by gamma-ray are favourble for fabricating charge-mosaic membrane, which could be used in desalination and purification of biochemicals.