Based on the criterion of Miner linear cumulative damage,we propose the specific implementation steps of fatigue analysis of the mooring line and anchor chain when only considering pontoon mooring devices’stress changes of mooring line and anchor chain as main factors causing the fatigue damage.Based on one slop wharf project in the inland river,we calculate each mooring line and anchor chain’s average daily stress-duration curve within the scope of the whole fatigue life period under the four kinds of random process.Taking these stress values as samples,we calculate to get the cumulative fatigue damage of every one,and predict the fatigue life.The fatigue analysis method can not only provide a strong technical support for the safety hidden dangers’rectification of pontoon mooring devices in the inland river,but also provide technical reserves for new wharf engineering projects in the inland river.