Abstract: 6.5%Si high silicon steel sheets were prepared under different warm rolling temperatures,then recrystallization annealing at 900 ℃for various times were carried out.The effect of warm rolling temperature on the evolution of microstructure and texture during the recrystallization process and the magnetic performance was studied by using optical microscopy and electron backscatter diffraction.The results show that when the rolling temperature is low,the grain size after recrystallization annealing is smaller and the microstructure uniformity is poorer. Low temperature rolling promotes the formation of high-density intragranular shear bands,which promotes the nucleation and growth of recrystallized grains.Consequently,the recrystallized annealed sheet has higher strength of η fiber texture,thereby,the magnetic induction intensity is improved.However,the grain size is relatively smaller and the microstructure uniformity is poorer,resulting in higher iron loss.