The invention discloses a method for preparing methylacrylic acid-2, 2, 2-ethyl trifluoroacetate. The method adopts methylacrylic acid as the raw material, and the methylacrylic acid is reacted with thionyl chloride under the existence of DMF and polymerization retarder; the obtained methacrylic chloride is reacted with 2, 2, 2-ethyl trifluoroacetate under the existence of catalytic agent, then the target product of the invention-methylacrylic acid-2, 2, 2-ethyl trifluoroacetate-can be collected from the reaction product, the purity rate reaches more than 98 percent (GC), and the production rate is more than 95 percent. The reaction process condition of the invention is bland, the operation is secure and simple, the raw material sources are extensive, and the price is low; compared with the prior technology, the invention overcomes the deficiencies that the raw material price is expensive, the preservation and the transportation of the raw material are difficult, the reaction system request is harsh, the equipment corrosiveness is strong, the product quality is steady, the purity rate is good, the production rate is high, and the invention is suitable for large-scale industrialization production.