The methanol-to-olefin (MTO process for short) technology, developed by UOP, is adopted, and the supporting MTO-100 catalyst (SAPO-34) is used; Wison Engineering (China) Co., Ltd. is responsible for the detailed design and contract. The methanol is used as raw material for the unit, with a design treatment capacity of 750,000 t/year. The unit is mainly composed of the feed and product separation, reaction and regeneration, catalyst recovery systems, product compression and product concentration plants. featuring large scale, less personnel required, advanced technology, high integration degree and localization degree.