Kinetics of solution photopolymerization of acrylonitrile(AN) with sensitizer, such as NaSCN, KSCN, Ba(SCN)₂, NH₄SCN, ZnCl₂ and Na₂SeO₃, were studied using UV crosslinker at various monomer concentrations(1.8∼7.58㏖/ℓ), sensitizer concentrations(10∼60%), reaction temperature(10∼70 ℃), energy intensities(1000∼9900μJ/㎠) at isothermal condition under nitrogen atmosphere. Under the irradiation of high pressure mercury lamp(λ=365㎚) High conversion and uniform molecular weight were obtained compare to thermal polymerization at reaction temperature of 50℃ reaction time of 3hr and 50% NaSCN without any initiator. Their kinetic model was as follows : R_P=0.0142[M]^(0.82)[I]^(0.49)[S]^(0.52) exp(-1.33/RT).