For all-steel tubular frame mooring structure of large offshore oil wharf,the calculated fatigue life using calculated mooring load will be short and be deviated from the actual situation.Currently there are fewer researches on the analysis of the measured mooring load,and they are disorder.This paper analyzes actual measuring mooring load of 300 000 DWT crude oil wharf expansion project in Ri-zhao port Lan-shan harbor,and finds out the probability law of distribution for mooring load and analyzes the fatigue damage of the tubular nodes.The analysis results show that the worst fatigue damage nodes are middle tube nodes,and mooring load has little influence on fatigue damage to all-steel tubular mooring pier,only 10-4 orders of magnitude.