Recently, the index of diene consumption methanol from Chemical Branch of Shaanxi Company hit the best level in history, the monthly average of 2.876t/t, reaching the leading level in China, with the incremental monthly efficiency of 4 million yuan. First, set up a task force to track the single consumption, sort out the factors affecting the single consumption index in detail, and take timely measures to adjust. Second, use mixed carbon four pre-deposition measure, ton of olefin consumption of methanol consumption is reduced by 0.02t/t. Third, analyze the catalyst activity in the system regularly to improve the yield of diene. Fourth, put the MTO intelligent control model into operation. The main indicators are in intelligent control and the reliability rate of the operation of the device has been significantly improved. (Shaanxi Company)