Excessive refining of soybean oil is the main reason of its nutrient loss, it also adds to the cost of soybean oil refining, and aggravates pollution of the environment. Oil degumming is an important part in oil refining process, which plays an important role in the later refining process, because the enzymatic degumming process has higher efficiency and lower environmental pollution. Many oil processing enterprises pay an increasing attention to it. By inlroducing the four kinds of phospholipase-phospholipase A1 （PLA1）, phospholipase A2 （PL...
