Abstract: In this paper tension-tension (R=0.1) fatigue behaviour and residual static tensile strength of unidirectional graphite/epow composite were studied by using GB 3354-82 spec imens of straight-sided type with long gage length (GB-National Standard,China).The S-N curve and fatigue limit were obtained by means of test method in group and the staircase method. The number of stress cycles,at which the machine stops or the load drops due to the damage or crack occuring in the specimen,is taken as the life of the specimen at that stress level.The S-N curve ie a straight line and tends to horizon near the fatigue limit.