α-Galactosidase has both hydrolysis ability to catalyze the breakage of α-D-galactoside bond andtransglycosylation activity, and is widely used in the feed, medicine, food and chemical industries. Toalleviate the anti-nutritional effect of galactooligosaccharides in soybean meal and promote animalhealth, α-galactosidase is generally supplemented in the feed stuff. Due to the high cost, low yield, andthermoliability under high-temperature feed processing conditions, application of α-galactosidase ismuch limi...