The invention provides a method for rectifying and refining ethylene glycol. Ethylene glycol is subjected to reduced pressure rectification by a reaction rectification tower, and the rectification tower comprises a rectification section, a reaction section and a stripping section; a filler of the reaction section is filled with a supported metal catalyst; an ethylene glycol rectifying material contains 1,2-propylene glycol and formic acid; after the ethylene glycol is separated and refined, the ethylene glycol product having the ultraviolet transmittance according with PET polyester standards is obtained from a tower top.