Abstract: A set of particle explosion motion equations is utilized as the basis of this study, through which the spatial positions of particles at different times are calculated in real time to construct a spatial model of the cloud. Based on the constructed particle cloud scattering model in the collision scenario, the generalized Rayleigh-Gans approximation method is adopted to simulate the particle scattering in the cloud, and the vector radiation transfer equation is combined with the Monte Carlo method to simulate the energy changes of photons in the particle cloud. The electromagnetic characteristics of the particle cloud are then analyzed. The research results indicate that at the initial moment, the particle cloud is in a dense state, and the coupling effect between particles is strong. As time increases, the radius of the particle cloud is observed to increase, and the coupling effect between particles gradually disappears. When the cloud diffuses to a certain extent, the radar cross section of the particle cloud cluster is found not to increase with the increase of the radius of the particle cloud. In addition, this paper also studies the electromagnetic scattering characteristics of the cloud under different parameters such as cloud density, particle size, frequency, and dielectric constant, and further conducts a detailed analysis of the sensitivity of the cloud. These analyses provide theoretical support for the scattering research of irregularly shaped clouds in collision scenarios.