研究了几种不同预应变量Ｆｅ３０Ｍｎ６Ｓｉ５Ｃｒ合金经室温预应变－４５０℃回火６次训练ＳＭＥ的变化；结果表明训练效果对预应变量有明显的依赖关系，预应变量εｐ为１％左右时６次训练恢复率没有明显变化，而εｐ为３％～４％时，恢复率显著提高，最大形变恢复率分别达９３％、７８％，εｐ大于５．５％后，第６次训练恢复率开始下降。并用金相及Ｘ射线衍射研究了εｐ分别为３％、５．５％的合金训练过程中微结构的变化。 The changes of SME of Fe30Mn6Si5Cr alloy subjected to tempering at room temperature and pretemperature of -450 ℃ for 6 times were studied. The results show that the training effect has obvious dependence on the prestrain. Prestrain εp , The training recovery rate did not change significantly after training for 1%, while the recovery rate was significantly increased when εp was 3% ~ 4%, the maximum recovery rate was 93%, 78%, εp was greater than 5.5% 6 training recovery rate began to decline. The changes of microstructure during the training process of alloy with εp of 3% and 5.5% were studied by metallography and X-ray diffraction.