Abstract: The limitations of the crystal structure of magnesium alloy in its coordination mechanism of low temperature deformation were briefly described.The plastic deformation coordination mechanism of rolled magnesium alloy was discussed from grain orientation and size.The microstructure formation mechanism of the magnesium alloy under different coordination mechanisms during rolling deformation from low temperature to high temperature was synthetically reviewed.Finally, the prospect of improving the low temperature plasticity of magnesium alloys was put forward.