Method for synthesizing polyaspartic ester in presence of supported alkali metal fluoride serving as catalyst

The invention discloses a method for synthesizing polyaspartic ester in presence of a supported alkali metal fluoride serving as a catalyst. In the method, based on the Michael addition reaction of dicarboxylate and primary amine, the supported alkali metal fluoride is used as a catalyst to make the conversion rate of primary amine to reach over 95 percent at a lower temperature in a shorter time period; then glycidyl tertiary carboxylic ester is added to react with the rest primary amine to form a polyaspartic ester product; and thus, the conversion rate of the primary amine is 100 percent. When the method disclosed by the invention is used to prepare the polyaspartic ester, the production period is reduced greatly, the problems of low production efficiency, high production cost and the like in the prior art are solved effectively, and meanwhile, the deepening of the color of the product with an overhigh reaction temperature is avoided. The method disclosed by the invention is simple, convenient and easy to implement and large-scale production can be realized.