Polyacrylate emulsion containing ketone carbonyl was obtained by semi-continuous emulsion polymerization with methyl methacrylate, butyl acrylate, and acrylic acid as co-monomers and diacetone acrylamide as functional monomer. The acrylic emulsion was produced by adipic dihydrazide as the crosslinker, which does not crosslink reaction in storing at room temperature, and can solidify in the later drying stage when the ammonia volatile and the pH value of the drying film becomes low. The result showed that the solid content of acrylate emulsion reaches 50% with 3% diacetone acrylamide addition; the particle size is around 68. 1 nm and the distribution is narrow; the film cured at room temperature has high opacity, high-gloss, fast film-forming rate, and good overall performance.