The invention discloses a cellulose ether production technology and belongs to the technical field of fiber product processing. The cellulose ether production technology comprises refining, pulverization, etherification, separation and drying and is characterized in that the pulverization process comprises pre-mixing refined cotton produced in the refining process and an etherification agent according to a mass ratio of 62 to 74: 20 for 3-7min, feeding the mixed refined cotton into a wet crushing mill, carrying out crushing to obtain crushed refined cotton, individually and directly feeding the crushed refined cotton into a reactor in the etherification process, and carrying out an etherification reaction process. In the process of crushing, the refined cotton is in a special semi-wet state and the semi-wet state can ensure less heat and high safety in crushing so that the risk of explosion is avoided, a polymerization degree of the refined cotton is not destroyed and the quality of the product cellulose ether is improved.