The invention provides a method for extracting soybean oil compound breakdown emulsion by virtue of an aqueous enzymatic method, and belongs to extracting and processing technologies of vegetable oil and fat. The method comprises the following steps: (1) crushing soybeans, then performing extrusion puffing to obtain a puffed material, mixing the puffed material with water to obtain a mixed solution, adding alkali protease into the mixed solution to perform enzymolysis, and then performing centrifugal separation to obtain free oil, emulsion, hydrolysate and residues; (2) mixing the emulsion with a AlCl3 solution at equal volumes, then adding a microbial surfactant, mixing uniformly, and then adjusting the pH value to be neutral; and (3) performing ultrasonic treatment on the treated emulsion, and then performing centrifugal separation to obtain soybean oil. By adopting the method, the inorganic salt AlCl3, the microbial surfactant and an ultrasonic technology are organically combined together to form an integral compound demulsification system which is low in cost and pollution-free, and is short in demulsification time and high in demulsification rate, and the obtained soybean oil is high in purity and good in quality and has a wide application prospect in processing of the vegetable oil and fat.