The rubber dam project of Liuqing River in Linyi Municipality was completed and put into operation in 2009.Since its completion and operation, it has played the functions of storing surface runoff and improving ecological environment, and achieved good engineering benefits. However, after many years of operation, there are some quality problems and safety risks in the current project. After filling the dam bag with water, abnormal deformation occurs and water leakage is serious. The dam bag should be replaced to restore the rubber dam's function of retaining surface runoff and improving ecological environment. In construction, the method of cofferdam is adopted and the current ship lock is used to divert the flow, and the effect is better.