Abstract: This paper presents a new model of rain-flow real-time counting method.It has the advanges such as counting easily,not needing the whole loading-time course.And it is also not necessary to readjust or modify the loading-time course.The field loading-time course of the model can be counted directly.The model surmounts the limitation of the previous counting model.It doesn't need the second stage counting.The above research results have been applied to the data treatment of loading-spectra for the plane engine,the fighter plane and the war tank.