We model the natural dustlike particles by using mixtures of polydisperse,randomly oriented spheroids with varying aspect ratios. The rigorous T-matrix method was used to compute the single scattering of dustlike aerosols,and the result was compared with the spherical particle and single shaped spheroids. The results show that the phase function averaged over a wide aspect-ratio distribution of spheroids is smooth,featureless,and flat at the side-scattering angle and closely resembles those natural dustlike particles. Based on the vector radiative transfer theory,the multiple scattering characteristics of unpolarized light in dustlike aerosols are computed by the vector adding method with this model,and the result indicates that significant errors will be caused with the application of any single shaped particles to compute the scattering characteristics of dustlike particles.