Abstract: The laboratory experiments were conducted with hydration degumming soybean oil as raw material by the phospholipase lecitase ultra.The single factor results showed that the optimum reaction conditions were as follows:enzyme dosage of 30 g/t oil, water content of 3.0%, p H5.0, reaction temperature of 50℃, reaction time of 5 h.Under these conditions, the continuous enzymatic degumming production experiments were carried out on the 800 t/d production line.The results showed that the oil yield increased by 0.8%compared to the chemical method, it showed obvious economic benefits.The physical and chemical indexes and stability of refined oils produced by both methods were compared, and the results showed no obvious difference.