Abstract: Since the seawater desalination reverse osmosis unit of Hubu Company was put into operation, the salt leakage rate and transmembrane pressure difference have been increasing, and the water production volume has been decreasing, which affects the safety and economic operation of reverse osmosis. , This paper, after multiple investigations and discussions, confirms that the reason for the high salt leakage rate is the damage of reverse osmosis membrane elements, analyzes the reasons for the damage of membrane elements and lessons learned, formulates operation optimization measures, maintains the normal operation of reverse osmosis, and does not develop further. The economy of seawater reverse osmosis before and after optimization is also analyzed. Provide a reference for the search for the same type of desalination reverse osmosis problem.