本发明公开一种乙二醇二甲醚的制备方法,属于醚类有机化合物合成技术领域。该方法首先在反应釜中加入一定量的乙二醇单甲醚,然后第一次向乙二醇单甲醚中投入一定量的片碱并搅拌,将反应液温度冷却至 15℃~20℃, 再第二次投入一定量的片碱并搅拌后对反应体系降温, 将反应液温度控制 The invention discloses a preparation method of ethylene glycol dimethyl ether, belonging to the technical field of ether organic compound synthesis. In the method, a certain amount of ethylene glycol monomethyl ether is added into a reaction kettle first, and then a certain amount of caustic soda is added to the ethylene glycol monomethyl ether for the first time and stirred to cool the temperature of the reaction liquid to 15 DEG C to 20 DEG C , And then a second amount of caustic soda and stirred after the reaction system cooling, the reaction liquid temperature control