Abstract: Alkali-soluble resin was synthesized based on epoxy acrylate resin modified with acid anhydride for the introduction of carboxyl groups. Effects of temperature and type of anhydride on reaction conversion were investigated，and the structure of product was characterized by IR. Through L9 orthogonal experiment and the corelation study of photoinitiator with light curing time，the formulation of light-cured solder resist ink was optimized. The ink properties were tested and compared with related Japanese product.