Abstract: During statistic treatment of fatigue loads, rainflow counting method is commonly recognized to be a reasonable cyclic counting method. It was used widely in fatigue analysis. In this paper, we point out its shortcoming in connection with study for stress-strain response and present a modified rainflow counting method. The modified rainflow counting method can take out all the full cycles truly existing in the real stress-strain response, so it is a more reasonable cyclic counting method than the traditional rainflow counting method.Moreover, two existing effective coefficient methods for simulating stress-strain response are also discussed and a modified effective coefficient method is presented. This modified effective coefficient method does not request that the load （or stress） history start from a maximum peak （or minimum valley） point （for this reason, it can simulate any practical stress-strain responses） and can combine memory characteristics of a material with the modified rainflow counting method to complete simulations of stress-strain responses. Therefore, it is a better effective coefficient method.