Polyvinyl acetate（PVAc）emulsion，as the film forming material of photosensitive adhesive，had a great influence on the performance of photosensitive adhesive. In order toimprove the performance of photosensitive adhesive，polyvinyl acetate（PVAc）emulsion was synthesized and copolymerized with acrylic monomer and crosslinking monomer，then by seed lotion polymerization，a series of modified polyvinyl acetate emulsion and photosensitiveadhesive were prepared. The emulsion and photosensitive adhesive were tested by particle sizeanalysis，dynamic thermal mechanical analysis（DMA）， water contact angle test，water absorption test，and print resistance test. The results showed that the photosensitive adhesive film with hard monomers methyl methacrylate（MMA） and isoborneol acrylate（IBOA）indicated the best print resistance，the photosensitive adhesive film with monomers ethyl acrylate（EA）and methyl methacrylate（MMA）showed the lowest water absorption，and the addition of monomer butyl acrylate（BA）would make the crosslinking density of the photosensitiveadhesive film larger. While meeting the development requirements of photosensitive adhesive， samples modified with acrylic ester monomers could improve the water resistance of thephotosensitive adhesive. Except for the monomer isooctyl acrylate（IS），other monomers could improve the printing resistance of the photosensitive adhesive.