The evolution simulation of dust particles provides an important way to analyze the impact of dust on the environment. KMC-based parallel algorithm is proposed to simulate the evolution of dust particles. In the parallel evolution simulation algorithm of dust particles, data distribution way and communication optimizing strategy are raised to balance the load of every process and reduce the communication expense among processes. The experimental results show that the simulation of diffusion, sediment, and resuspension of dust particles in virtual campus is realized and the simulation time is shortened by parallel algorithm, which makes up for the shortage of serial computing and makes the simulation of large-scale virtual environment possible. 1. Introduction Many ecological environmental problems have emerged during the process of urbanization. Sedimentation of lots of surface dust in cities caused by transportation is one of them. Dust has close relation with particulates in the atmosphere [1]. Ecological system can be hurt by dust covertly over a long period, while it is human body that dust can do most direct and greatest harm to. Dust (especially suspended particulate matter with aerodynamic diameters less than 10？μm) has been one of the most serious air pollutants in China for many years. The surface dust can be resuspension under some certain circumstances and the contaminant will make bad influence on our body. It is shown by some researches that Pb can retard children’s intellectual development and weaken their intelligence, while these acknowledged prisoners including Cu, Cd, Cr, Zn, As, and Hg are in a position to change human beings’ nervous and respiratory system. A lot of problems are caused by the pollution of dust, such as laze, respiratory disease, and lung cancer [2]. As a result, research on the surface dust is not only a crucial aspect of environment evaluation, but has also great significance on human health when the urbanization is accelerating. The evolution process of surface dust includes sediment, diffusion, and resuspension. Nevertheless, it is quite difficult to study the evolution process of surface dust by experiment equipment currently because of the extreme complication of the evolution process. Therefore, simulation has become one of the most important means to research the dust evolution process. The current simulation research includes the diffusion of dust around buildings in cities and the relationship between dust deposition and wind power [3–7]. Dust diffusion is one of the hot topics of the dust evolution. Dust
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