An AZ31 magnesium alloy sheet with bimodal non-basal texture exhibits better rolling performance at room temperature compared with that with a typical basal texture. However, the rolling performance of bimodal non-basal texture sheets under medium temperature conditions remains unexplored. Therefore, this study aims to elucidate the rolling behavior and deformation mechanism of bimodal non-basal texture sheets at 200 ^oC. Employing EBSD characterizations, the microstructural characteristics of rolled sheets with initial basal and bimodal non-basal textures throughout a multipass rolling process were systematically investigated. Results showed that at medium temperature, the rolling performance of sheets with bimodal non-basal texture improved only slightly compared with those with basal texture. Especially, edge cracks were observed in deformed bimodal non-basal texture sheets after the fifth rolling pass, with a corresponding accumulative thickness reduction of approximately 48.0%. In contrast, sheets with basal texture exhibited edge cracks after the fourth rolling pass, with a corresponding accumulative thickness reduction of approximately 43.6%. A large number of basal <a> and non-basal dislocations (including prismatic <a> and pyramidal <c + a> dislocations) as well as a small number of {1011}-{1012} secondary twins were activated during the rolling deformation of basal texture sheets. These dislocations cause extensive dynamic recrystallization (DRX) near grain boundaries and twin interfaces, with the corresponding DRX volume fraction reaching as high as 47.9%. For bimodal non-basal textured sheets, in addition to the activation of high-density dislocations at the beginning of rolling deformation, an extensive {10\overline{\mathrm{1}}2} extension twins (ETs) were activated to carry plastic strain. With increasing rolling passes, {10\overline{\mathrm{1}}2} ET boundaries migrated toward the matrix region and absorbed a large number of dislocations, thereby reducing the dislocation density within deformed grains. This phenomenon would delay the DRX onset, resulting in a small DRX volume fraction of approximately 11.4%. The pronounced difference in the DRX behavior between bimodal non-basal texture sheets and basal texture sheets at medium temperature primarily accounts for their similar rolling performance, with mere 4.4% difference in accumulative thickness reduction.