Aspergillus oryzae PRB-1 strain

The invention discloses an aspergillus oryzae PRB-1 strain. The aspergillus oryzae PRB-1 strain is obtained by rejuvenation, separation and purification on soybean sauce seed yeast of Guangdong Zhujiangqiao Biotechnology Incorporated Company and is preserved in the China Center for Type Culture Collection on Dec. 4th, 2013 at the preservation number of CCTCCNO:M2013628. The strain is high in growth fecundity; mycelia has strong growth; the genetic stability is high; finished koji prepared by the strain is bright green and has rich spores; the spore sprouting rate is high, the protease is high in activity, and fermented soybean sauce is high in yield and high in quality. The strain disclosed by the invention plays an important role in making the soybean sauce and has a good application prospect.