Production system of ethylene-vinyl alcohol copolymer precursor

The utility model provides a production system of an ethylene-vinyl alcohol copolymer precursor, and belongs to the technical field of polymer preparation devices. The production system comprises a first reaction kettle, wherein the first reaction kettle is sequentially connected with a second reaction kettle, a condensation tank, a gas escape kettle and a purging tower through pipelines; the kettle top of the gas escape kettle is respectively connected with the first reaction kettle and the second reaction kettle through an ethylene feeding pipeline; the bottom of the purging tower is connected with a steam pipeline, and the top of the purging tower is connected with the first reaction kettle through a solvent circulating pipeline; the first reaction kettle and the second reaction kettle are respectively connected with a liquid feeding pipeline. The production system of the ethylene-vinyl alcohol copolymer precursor provided by the utility model can improve the reaction efficiency and the monomer conversion