The present progress and applications in research on high manganese twinning induced plasticity and transformation induced plasticity（TWIP/TRIP）steel were summarized. The influence of grain size on TWIP effect was investigated. The evolution of grain size was investigated，which the mechanism of deformation twin evolution was analyzed. The deformation mechanism of deformation induced martensite and deformation twin was investigated. The effect of vanadium carbid（VC）precipitates on the delayed crack and strain hardening behavior was investigated， and the interaction between VC precipitates and deformation twin was discussed. The post-treatment technology，microstructure，mechanical properties and deformation mechanism of high manganese TWIP/TRIP steel fabricated by using twin-roll strip casting were investigated.