The invention discloses an acrylate synthesis method. The method is characterized by directly synthesizing acrylate by adopting batch reaction, using CO2 and ethylene as raw materials, acetonitrile as a solvent, a metal Ni complex as a catalyst and anhydrous sodium carbonate as a promoter, and adding a methylation reagent to continuously react for 10-24 hours after reacting for 15-30 hours, wherein the mole ratio of ethylene to carbon dioxide is (1 to 1)-(1 to 5), preferably (1 to 2)-(1 to 4); the reaction temperature is 40-130 DEG C, preferably 50-120 DEG C; the reaction pressure is 0.5-6.0MPa, preferably 1.0-5.5MPa. In the method, acrylate is directly synthesized under the action of the methylation reagent by using CO2 and ethylene as the raw materials. The method has the advantages of low reaction temperature, high product yield, and the like.