In this text, the hydrolysis was studied by using the natural soybean phospholipid as substrate and first with phospholipase A_2 produced by Streptomyces lividans 1326. The factors, such as technology of enzyme hydrolysis phospholipids, activities of emulsification of lysophospholipid, had been discussed with emphasis. The modified phospholipid has a good stability of emulsion with high salt and over a wide range of pH. As an additive in food, it prevents unwanted colorization of food or contamination with ...