Abstract:High-pressure jet homogenization was applied to ultra-fine processing on soybean meal，and a nanosized aqueous dispersion was obtained. The aqueous dispersion was used as an emulsifier for the preparation of O/W Pickering emulsions，and the microscopic morphology and stability of the emulsion were tested. The data showed that with the same operating parameters，high-pressure jet homogenization process using a three-slot valve achieved a superior refinement effect compared with a straight-orifice valve，as evidenced by a significant reduction in soybean meal particle size，with the particle size index d（ 0.5） decreasing to 0.157 μm. A mixture of a nanosized aqueous dispersion and a certain portion of soybean oil can be converted into a stable Pickering emulsion by ultrasonic emulsification. In the stable O/W Pickering emulsion stabilized by 1.2% nanosized soybean meal′s aqueous dispersion，the oil droplets were uniformly dispersed，with a particle size index d（ 0.5） of 1.396 μm， and relatively low shear viscosity was observed. The research revealed that O/W Pickering emulsion based on soybean meal had good emulsifying properties and could be effectively applied to the protection and delivery of bioactive components.