The experiment of multi-pass cold rolling of AZ31 magnesium alloy sheet with a base surface texture was carried on by using different reduction. And combined with the calculation of the Schmid factor of each deformation system,the influence of deformation mechanism on cold rolling capacity was analyzed. The results show that the smaller the pass reduction(i.e. the bite angle) of AZ31 magnesium alloy sheet is, the greater the limit deformation without crack is; the limit deformation can reach 26.67%(no crack...