Dense gas-solid flows are very common in actual production and industrial fields, so it is significant to understand their hydrodynamic characteristics and heat and mass transfer behaviors. This article provides a brief review of multi-scale numerical simulation of flow, heat and mass transfer behaviors in dense gas-solid flows. It describes multiscale models (direct numerical simulation, discrete particle model, and two-fluid model) and the results of related research. Finally, it discusses possible future developments in research on the flow, heat and mass transfer characteristics of dense gas-solid two-phase flows.