研究了高锰钢在拉伸过程中形变硬化行为及组织结构变化，结果表明，其真应力、真应变分段符合Ｈｏｌｌｏｍｏｎ方程，表现为双ｎ行为，高锰钢优异的形变硬化性能表现在ｎ＿２阶段，为孪晶强化，在位错强化的几阶段，其形变硬化不显著。在拉伸曲线上出现锯齿形状的同时，试样表面也出现平行的痕迹，这两个特点又表明具有面心结构的高锰钢拉伸形变时。似有早为人知的Ｐｏｒｔｅｖｉｎ－ＬｅＣｈａｔｅｌｉｅｒ效应。 The results show that the true stress and true strain are in accordance with the Hollomon equation and show a double n behavior. The excellent deformation and hardening properties of high manganese steel are shown in n_2 Stage, for the twinning strengthening, dislocation strengthening in several stages, the deformation hardening is not significant. In the tensile curve sawtooth shape at the same time, the sample surface also appeared parallel traces of these two characteristics and that with a face-centered structure of high manganese steel tensile deformation. It seems that the earlier known Portevin-LeChatelier effect.