In order to extend the absorption region of benzophenone derivatives for bettermatching with LED light sources，three 4-bis（benzylamino）benzophenone derivatives weresynthesized by introducing benzylamino group into benzophenone structure. Their absorptionwavelengths were extended to 400 nm，which could well match with LEDs at 365-405 nm. The photopolymerization kinetics was studied by real-time FT-IR，and the photoinitiation mechanismwas clarified by electrochemical tests and photodegradation tests. The results showed that bis（benzylamino）benzophenone derivative was an efficient LED photoinitiator，which could initiate the free radical polymerization of 1，6-hexanediol diacrylate with the double bondconversion of 80%-83%. When combined with iodonium salt，the epoxy monomer conversion reached 45% for cationic polymerization，the double bond and epoxy monomer conversion rates were 69%-71% and 58%-61%，respectively，for radical-cation hybrid photocuring，showing potential application value in the field of free radical polymerization and interpenetrating polymer network photocurable material preparation.