Preparation method for fluorine-containing acrylic ester

The invention relates to a preparation method for fluorine-containing acrylic ester. The method comprises the following step of: esterifying perfluoro alkyl ethyl iodine and alkali metal and/or alkaline earth metal of acrylic acid or methyl acrylic acid or halogenated acrylic ester in a polar non-proton organic solvent with boiling point of 140-400 DEG C in the presence of a phase transfer catalyst at the temperature of 140-200 DEG C. According to the method, the polar non-proton organic solvent with high boiling point is used as a solvent for the esterification, and the phase transfer catalyst is used in a matching way, so that the selectivity for the reaction is greatly improved; after the esterification is finished, a target product with the content being greater than 98 percent can be obtained through simple filtration and reduced pressure distillation treatment; meanwhile, the molar yield of the product reaches up to over 80 percent. Meanwhile, according to the method provided by the invention, a high-pressure reaction kettle and a special distillation tower are not required, so that the method has the advantages of low equipment requirement, easiness in operation, high safety, easiness in control and low production cost and is particularly suitable for industrial production of the fluorine-containing acrylic ester.