4-(2-methacryloxy)methylbenzophenone(4-MAMBP), a highly efficient polymerizable photo-initiator, was synthesized with 4-methylbenzophenone and 2-methylpropenoic acid, which was characterized by 1HNMR and UV absorption spectra. The hardness of TMPTA cured film was measured by pencil hardness test. Real time infrared spectroscopy (RT-IR) was applied to investigate the effects of different monomer system, various light intensity and concentration of photo-initiator on the polymerization kinetics. Finally, the photo-initiator residual of the cured film was determined. The results indicate that with the increment of light intensity, the rate of polymerization (Rp) and final double bond conversion will increase. The double bond conversion and Rp of difunctional monomer is higher and faster than that of multifunctional monomer. While the concentration of 4-MAMBP increases from 0.2% to 1.4%, the monomer’s double conversion and polymerization rate will obviously increase and make the induction period shortened. However, with increment of 4-MAMBP concentration to 1.8%, double conversion and polymerization will decrease. The photo-initiator residual of 4-(2-methacryloxy)-methylbenzophenone is much lower than that of BP for its crosslinking in the cured film.Cited