The invention relates to a normal-temperature fungus NJGZ-2 capable of degrading agricultural waste straw, belonging to the agricultural waste resource utilization technology. The class of the strain NJGZ-2 is named penicillium oxalicum, and the culture is collected in the China General Microbiological Culture Collection Center (CGMCC), with collection number CGMCC No.7527. Tests indicate that after the rice straw is inoculated with a spore suspension (1% 10<7> spores/mL), the weight loss ratio of the rice straw is 59.7% after 7 days of 170r/min liquid fermentation culture at 30 DEG C. In the fermentation crude enzyme extraction liquid, the activities of incision enzyme, beta-glucosidase, xylanase, beta-xylosidase and total cellulose are 113.3U/gds, 11.6U/gds, 1,439.7U/gds, 2.0U/gds and 13.8U/gds respectively. The crude enzyme liquid can hydrolyze low-concentration alkali-treated corncob to generate high-concentration reducing sugar (962.2mg of reducing sugar/gram of substrate). According to the invention, the agricultural waste straw is degraded by the microbial fermentation technology and is converted into organic fertilizer, therefore, the waste can be turned into wealth to protect the environment, and application prospects are broad.