Bacillus pumilus is a rod-shaped bacterium with rounded ends, typically appearing as single cells or in short chains, and measuring 1.2-1.5 × 2.0-4.0 μm. It is motile and Gram-positive, with ellipsoidal spores that are 1.0-1.2 × 1.5-2.0 μm in size, located centrally or at secondary terminal positions. This bacterium is capable of hydrolyzing starch and breaking down mannan, xylan, cellulose, and other substances. It finds extensive applications in industrial processes, including agricultural production, various traditional fermented foods, wastewater treatment, and environmental pollutant degradation.