In this work,through pre-coordination and subsequent polymerization from blue complex monomer with polysiloxane prepolymer,a novel organosilicon copolymer was obtained by solution polymerization.The influence of reactant ratio and temperature on the luminescent properties of samples was discussed.The results shows that:with the increase of complex content,the fluorescence intensity of samples increases.Temperature has almost no effect on the fluorescence properties of the sample,and the copolymer keeps stable up to 351 ℃.The blue LED fabricated with the copolymer phosphor emits bright blue light.All the results indicate prepared copolymer phosphor is a promising material used for three-primary-colours white LED.