Magnesium alloy AZ31 sheet was processed by isothermal repeated bending technology （IRBT） at different temperatures. Microstructure and texture as well as properties of magnesium alloy sheet were analyzed. The results indicate that the twinning crystal is the dominant deformation mechanism at 443 K and 483 K

and initial recrystallization grain appears near the twinning boundaries. With deformation temperature of 523 K

initial recrystallization is observed at grain boundaries. For initial magnesium alloy sheet

the elongation is 12.4% and the texture intensity reaches 9.8 at room temperature. When magnesium alloy AZ31 sheet was bended 3 passes at 483 K

the elongation reaches 17.1% and the texture intensity is 5.75 at room temperature.