The invention discloses bradyrhizobium ganzhouense sp.nov. and application thereof. Bradyrhizobium ganzhouense sp.nov. RITF806 is preserved in China Center for Type Culture Collection (CCTCC), Wuhan University, Wuhan, China since 26th Feburary, 2014, and the preservation number is CCTCC NO: M2014044. Bradyrhizobium ganzhouense sp.nov. is separated and screened out from acacia melanoxylon rootnodule, is capable of realizing nodulation symbiosis with acacia melanoxylon, acacia aneura, acacia implexa and the like, has high stress resistance, and has wide application prospect for azotification microbe inocula and bio-organic fertilizers.