Through in-lab simulation, research was carried out on retention and migration of soil particles in different sandy porous media relative to concentration of soil suspension, to explore characteristics of the migration of soil particles in sandy porous media. Results show that migration of soil particle in sandy porous media was influenced by size and concentration of soil particles as well as composition of the porous media. Retention dominated the transport of soil particles through porous media with retention rate increasing with the concentration of soil particles, and decreasing with the proportion of coarse sand in porous media. The outflow of total particles, > 50 μm particles and 1～50 μm particles increased with the input amount of their respective fractions in a power function, while the outflow of < 1 μm particles increased linearly with the input amount. The outflow of total particles increased linearly with the proportion of coarse sand in porous media. The results from this study suggest that composition of porous medium and size and concentration of soil particles are major factors affecting migration of soil particles through sandy porous media, and factors that should be taken into full account in the study on fate of soil particles and contaminants in porous media.