In view of the lack of evaluation methods and suggestions for structural fatigue damage caused by sea ice in existing codes, based on the measured ice vibration response characteristics of the aging platform structure, the numerical simulations in terms of ice thickness, ice speed and ice direction are carried out, and the mathematical relationship between the vibration response of the upper part of the platform and the hot spot stress of the structure is established. Based on the safety life analysis method, a method is proposed for evaluating the ice vibration-induced fatigue damage of jacket platforms based on field monitoring. Taken the Jz20-2 jacket platform in the Liaodong Bay of Bohai Sea as an example, according to the measured data of ice vibration in different periods, the method is used to determine the hot spot stress standard deviation, cycle times and the corresponding fatigue damage, and the results are compared with the fatigue damage calculated by spectrum analysis method. The outcome of this study verified the effectiveness of the proposed method.