Zein, soy protein and whey protein can interact with lecithin to form composite systems. Proper application of ultrasonic, high-pressure homogenization and spray drying can make the composite systems more stable, expanding their application in delivery systems and making them promising for application in the fields of food, medicine, and other industries. This review focuses on the effect of the three physical field techniques on the interactions of the three proteins with lecithin and their application to deliver bioactive substances and drugs. We believe that this review will provide a basis for improving the stability of protein-lecithin composite systems and its application in delivery systems.