Abstract: Mastersizer 3000 laser particle size analyzer and Turbiscan dispersion analyzer was used to study the effects of homogenization conditions on stability of walnut milk, by analyzing the particle size distribution, average particle size, backscatter spectra, and stability index curves. The results showed that the homogenization pressure,temperature, and times had significant effect on the stability of walnut milk. According to single factor experiment, the optimum conditions were as follows: pressure 40 MPa, temperature 70 ℃ and repeated for twice. Under this condition the average particle size was (26.18±0.75) μm and the TSI was 0.8. This research would provide a reference method for the development and technology research of walnut milk.