Frequency modified method, Ostergren method, the energy method of three parameter power function and the simplified energy method were chosen to predict TMF life in three nickelbase superalloys. And the prediction ability of them was assessed. The results indicat that the above methods could predict the TMF life of three nickelbase superalloys at some extent. The simplified energy method among the method was the best. The main damage mechanism of TMF was partly similar to isothermal fatigue. According to quantitative evaluation of life prediction ability to the model, the effect of fatigue lifetime prediction on outofphase was better than inphase only when the plastic deformation was considered. What's more, the simplified energy method which was based on the law of energy conservation had the rationales. And the prediction capability of that method was better than the other methods. Therefore, it was suitable to forecast the lifetime of TMF in nickelbased superalloy.