Pickering emulsions stbilied by sohid nanoparticls have become a hot topie in maleriak chemistry as an ef ficient system for biocatalytic reactions. This system has many advantages， such as high catalytic efficiency and easy re-covery of enzymes and carriers， and has received attention from food researchers in recent years. Based on the related research on biocatalytic reaction systems of Pickering emulsions in inorganic and organic synthesis fields, this paper re-views the advances in the design of particle emulsifiers， catalytic reaction systems， and reactor engineering in three as-pects，and summarizes the application of Pickering emulsion biocatalysis in the food field. The aim is to provide theoreti-cal support and inspiration for promoting the green, efficient, and sustainable development of the food industry.