The gas- solid two-phase flows of the precalciner were simulated by different multiphase models, such as mixture model, the Eulerian model, including mixture and dispersed, and discrete phase model (DPM). The results of the different multiphase models were analyzed and compared, showing the rationality of the diffusion and mixture of the cement raw meals and coal powder to some extent. Moreover, the results also show the rationality of the given inlets parameters of actual process of the precalciner.