Abstract: Aimed at the problem that the diversion of slope revetment engineering in the middle and lower reaches of Yangtze River is difficult to match the flood frequency standard specified in the current code, the return period of construction time was proposed to measure the diversion standard of slope revetment project.Taking a revetment project in the Wuhan Section of the Yangtze River main stream as an example, the construction time for the five-year return period is 36 days.The over-water slope protection works are scheduled to be completed within 36 days, which can meet the diversion standard for the five-year return period.The return period of construction time can measure the failure risk of the slope protection project s diversion system.Under the same return period, it is consistent with the risk level represented by the flood frequency standard stipulated in the code.The research results show that taking the construction time regression period as the diversion standard for slope bank protection projects can further improve the diversion design of bank protection projects and also provide scientific guidance for engineering construction.