The random sampling method for inspection and acceptance of waterway regulation engineering has not been clearly stipulated in relevant current water transport standards.In order to reflect the actual situation of the waterway regulation project,an improved random sampling method based on the characteristics of waterway regulation project is proposed by referring to the random sampling method in the Field Test Methods of Subgrade and Pavement for Highway Engineering,considering the influence factors such as the riprap structure form and dam body size of dam construction project.Thus,artificial influencing factors of technicians in sampling inspection are eliminated.Under the joint witness of all construction participants,this method can fairly and reasonably confirm the location of sampling section for acceptance inspection of engineering.The improved sampling method is more simple and effective,easy to operate on site,provides strong data support for project quality supervision.