Abstract: Three-dimensional visualization of soil colloidal aggregation would be helpful to better understand the dynamics of soil cohesion and aggregate formation. In this paper particle system was applied to simulate soil colloidal particles and realize visualization for dynamic evolution of soil colloidal rapid condensation . Firstly, the soil as a soil cube, soil colloidal particles as sphere, all particles were used for model construction. Secondly, under the action of Brownian motion colloidal particles moved random with diffusion coefficient and aggregated when collision occurred. A fixed center of the monomer cohesion and cluster cohesion were implemented and the simulation result was satisfactory. Three-dimensional fractal dimension was calculated and the values were consistent with the fractal theory and similar research. Fractal dimension increased with the particle concentration, gyration radius decreased with the particle concentration. The method implementes visualization of soil colloid aggregation dynamic process.