Abstract:Protein drugs are easy to be degraded and inactivated. Thus how to sustain the activity of protein to make them function effectively has been a key problem in the application of protein drugs. Microencapsulation is to load a protein into a capsule,therefore,the target protein is isolated from the environment and could be protected. This paper reviews several common preparation methods of protein microcapsules,including layer-by-layer self-assembly,emulsification process,electrostatic droplet generation,etc.,which lays a foundation for the wide application of protein microcapsule in the future.