Novel method for preparing glyceride type polyunsaturated fatty acid

The invention discloses a novel method for preparing glyceride type polyunsaturated fatty acid, which comprises the following steps: fully and uniformly mixing polyunsaturated fatty acid ester with a first batch of glycerol to obtain a first batch of mixture; adding a transesterification catalytic enzyme into the first batch of mixture, vacuumizing, and carrying out a stirring reaction to obtain a first batch of reaction liquid; after reacting for a certain time, adding the residual required amount of glycerol into the first batch of reaction liquid, and continuously vacuumizing and stirring until the reaction is finished, so as to obtain a second batch of reaction liquid; separating and removing lipase from the second batch of reaction liquid, then carrying out molecular distillation, and removing unreacted polyunsaturated fatty acid ester to obtain a third batch of reaction liquid; and decolorizing the third batch of reaction liquid, and separating to remove the decolorizing agent, thereby obtaining the fin