The cluster-cluster aggregation model of soot and the discrete dipole approximation method are used to analyze the single and multiple scattering channel characteristics of ultraviolet (UV) light under different soot concentrations and particles sizes as well as the influence of scattering angle on the scattering intensity. The research results show that with the UV line-of-sight communication method, the path loss increases with the increase of the soot concentration when the particle radius is the same, meanwhile when the soot concentration is constant, the path loss also increases with the increase of particle size. With the UV non-line-of-sight communication method, the larger the soot concentration and the original radius, the less the path loss of the scattering channels at a short distance. In contrast, at a long distance, the higher the soot concentration,the larger the path loss, however, the difference among path losses for different concentrations is small. In the case of multiple scattering, the scattering light intensity decreases with the increase of scattering angle, while when the scattering angles are the same, the higher the soot concentration, the greater the scattering UV light intensity.