In this paper,4,4’-dichlorophenyliodonium hexafluorophosphate was synthesized through 4 step reactions.The target product was novel cationic photoinitiator.The structure of the compound was identified by UV,IR,（）1H-NMR,and MS.The optimal operation conditions were determined through orthogonal layout expriment.4,4’-Dichlorophenyliodonium hexafluorophosphate 4.95g（10mmol）,diphenyl sulfide 10ml（6mmol）and catalyst 3×10-4mol were reacted at 120℃ for 3 h,and the yield was 87.9%.
