Abstract: New difunctional photoinitiator was synthesized with 1,1,3-trimethyl- 3 -phenyLindane through friedel-crafts and hydroxylation reactions, the performance of the product is more excellent than traditional small molecule photoinitiators. 1H NMR and IR were applied to characterize the product. Compared with small molecule photoinitiators, the UV absorbtion of the new compound shifted 14nm and migration rates in the cured film lowered 80~90%, and therefore kept a good thermal stability. At the same time, it retains polymerization rate as high as small molecule photoinitiators，so it is an excellent photoinitiator.