Abstract:According to the practical condition and force of “8” shaped cushion, the FEA method was applied to analyze its state force, the fundamental mathematical relations between its amount of compression and the maximum stress and external force were attained.Based on the experiment results, with the S-N fatigue curve of rubber which was of identical hardness as the reference, the fatigue life curve for the texture of “8” shaped cushion was ascertained, and the corresponding fatigue lives of different amount of compression were achieved, thus providing theoretical reference and foundation for the design of telescope steel cover for guideway of machine tool.