Abstract:Functional powdered oil produced by microencapsulation technology is widely used in infant formula and food for special medical purposes which are produced by dry process technology. It is rich in active ingredients such as unsaturated fatty acids and phytosterol that are easily oxidized，which makes it susceptible to environmental factors. The methods to prevent functional powdered oil oxidation include increasing the embedding rate of the core material，adding antioxidants to the core material，adding antioxidants to the wall material，using antioxidant enhancers，and changing the way antioxidants are added. This article reviewed the microencapsulation technology of functional powdered oil and the methods to prevent its oxidation，providing reference for further development of functional powdered oil.