Abstract: In order to study the effect of corrosion on the reliability of the jacket structure of OWT under combined loads of wind and wave, a reliability analysis method for the jacket structure of OWT considering the effect of corrosion is proposed. Taking a jacket structure as an example,a nonlinear model is established by using the uniform corrosion model, which obeys Weibull distribution. The environmental parameters of wind and wave are taken as the random variables. By using Monte Carlo method, the reliability of the OWT supported by a jacket under different service time is calculated based on the damage critical lines, which are obtained in the performance assessment of bearing capacity of the structure. And the effects of corrosion on the bearing capacity and reliability of the jacket structure of OWT are analyzed. The results show that, the reducing amplitudes of wave heights and wind speeds for various component damage status have positive correlation with the corrosion rate. The reliability index of the jacket structure of OWT decreases with the increase of corrosion time.