The reductive leaching effect of manganese was studied using low-grade pyrolusite as raw material，corn stlak and rice straw as compound reductive agent in sulfuric acid medium. The appropriate technical conditions of reducion leaching of manganese from low-grade pyrolusite with corn stlak and rice straw-sulfuric acid by single-factor test were confirmed. The appropriate technical conditions were as follows：pyrolusite particle size was 109 μm，the mass ratio of corn stlak to rice straw was 1∶1.5，the mass ratio of reductive agent of corn stlak and rice straw to pyrolusite was 3∶10，sulfuric acid concentration was 3.0mol/L，the liquid-to-solid ratio was 10 mL/g，reaction temperature was 90 ℃ and reaction time was 80 min. The leaching rate of manganese in pyrolusite reached above 97% under the appropriate leaching conditions，the leaching effect of manganese was better.