Method for efficiently synthesizing bis(hydroxyethyl) terephthalate without catalysis

A method for efficiently synthesizing bis(hydroxyethyl) terephthalate without catalysis is disclosed. Terephthalic acid and ethylene glycol are adopted as raw materials. The method comprises the following steps: 1) putting a reaction system formed by mixing the terephthalic acid and the ethylene glycol according to a molar ratio of 1:(10-40) into a reaction vessel; carrying out esterification on the reaction system for 6-12 hours at the esterification reaction temperature of 175-195 DEG C and under atmospheric pressure. In the whole reaction process, inert gas flows through the reaction system; water generated by the reaction and used as a by-product is brought out of the reaction system by the inert gas; and after the reaction is finished, the reaction liquid in the reaction vessel is cooled and filtered, and filter cake is washed and dried to obtain the bis(hydroxyethyl) terephthalate. The bis(hydroxyethyl) terephthalate is efficiently synthesized in the absence of a catalyst, a reaction system is simplifie