Abstract:Pickering emulsion is an emulsion stabilized by solid particles，and it has gained increasing attention from scholars due to its excellent stability and biocompatibility.Among the various solid particles that stabilize Pickering emulsion，protein nanocages，with their unique cage-like cavity structure，good structural stability，uniform nanoscale size，and reversible self-assembly properties，have shown enormous potential in the field of functional Pickering emulsions.This article elaborated on the types of solid particles that stabilized Pickering emulsion，the varieties of protein nanocages，the protein nanocage-stabilized Pickering emulsion，and the applications，summarized the structural characteristics of different types of protein nanocages，and introduced the research progress in stabilizing Pickering emulsion using protein nanocages.Based on the natural cage-like structure and molecular self-assembly properties of protein nanocages，the latest research progress in constructing multi-compartment emulsion delivery systems and encapsulating and delivering nutritional components using protein nanocages was reviewed.