Abstract: The epoxy acrylate was synthesized with different amounts of inhibitor, feed ratios and feeding modes. The UV-curing coating was prepared, with the gel content in cured film measured. The results indicated that the esterification is improved with increasing content of inhibitor, but when the amount of inhibitor is up to 1.0%, the gel content of cured film decreases with esterification weakened. Slightly excessive content of epoxy in reactant is beneficial to improving the esterification. When the feed ratio n (Er):n (AA) is 1:2.0, the gel content in cured film comes up to maximum. The feeding mode that the acrylic acid, catalyst and inhibitor are premixed together and then added into epoxy is advantageous to improving the esterification of the synthesized product.