The hydrodynamic characteristics of the dense medium gas-solid (DMGS) fluidized bed for coal beneficiation and cleaning were analyzed and discussed by the experimental measurement and numerical simulation. The magnetite powder with a wide particle size of 0.3-0.15mm was selected as the major fluidized medium in this study. The simulation and experiment results indicate that the bed pressure drop can reach stable condition in a relatively short period with the increase of superficial gas velocity. Afterwards, the bed pressure drop shows minor fluctuations within the gas velocity of 1.8U(mf)<= U <= 2.2U(mf). Meanwhile, the bed density shows good homogeneity at various bed heights and axial directions with slight density fluctuation. Therefore, the results clearly demonstrate that the hydrodynamic characteristics of the fluidized bed, including the bed pressure drop and separating density distribution, overall maintain stable and uniform conditions without intense fluctuations. It provides favorable fluidization and separation conditions for coal beneficiation and cleaning in the three-dimensional spaces of DMGS fluidized bed.