Cellulosimicrobium cellulans with reducing capacity on hexavalent chromium and application

The invention discloses cellulosimicrobium cellulans with the reducing capacity on hexavalent chromium and application for solving the problem of chromium pollution in soil. The Latin name of a cellulosimicrobium cellulans strain is Cellulosimicrobium sp., and the preservation number is CGMCC NO 11511; the strain with the hexavalent chromium reducing capacity is obtained by collecting the soil polluted by chromium slag and then performing screening, separating and purifying. The strain can reduce the hexavalent chromium with the high toxicity into trivalent chromium with the lower toxicity, reduce the free property of chromium ions, relieve the stress effect of chromium on plants and reduce the chromium absorbing amount of the plants; in addition, the strain can fix nitrogen, be easily and fixedly planted in plant rhizosphere and promote the crop growth. The strain can be used for repairing the chromium-polluted soil and preventing chromium pollution from entering a food chain and is especially suitable for the actual planting national conditions that planting is performed on the polluted soil while repairing is performed in China, and the better application prospect is achieved in a chromium pollution treatment aspect in wastewater treatment.