The utility model provides a transesterification of ethylene carbonate purification system, including continuous rectification tower, continuous rectification tower overhead condenser, continuous rectification tower top reflux device, continuous rectification tata cauldron reboiler, batch distillation tower, batch distillation tower overhead condenser, batch distillation tower top reflux device and batch distillation tata cauldron reboiler. The utility model is used for transesterification of ethylene carbonate purification system, continuous rectification tower and batch distillation tower combine together, adopt the top of the tower of specific continuous rectification tower and the settlement of tower cauldron connected mode, the top of the tower of the specific batch distillation tower of reunion and the settlement of tower cauldron connected mode, make transesterification of ethylene carbonate refined through the continuous treating tower, the top of the tower, difference extraction weight component impurity at the bottom of the tower, side -draw transesterification of ethylene carbonate material, reentrant batch distillation tower is further refined, behind the batch distillation tata top extraction light component impurity, at side -draw transesterification of ethylene carbonate product, each item index satisfies the index requirement that lithium ion battery electrolyte solvent was used completely.