Abstract: In order to realize an effective separation and initial drying of lignite, a new type air heavy medium fluidized bed dry separation and drying integration de vice was applied to study the lignite separation with surface water and to investigate the surface water removal of the lignite and the heavy medium sticking behavior du ring the separation process.The results showed that the new type air heavy medium fluidized bed dry separation and drying integration device would have excellent sep aration effect of the lignite with surface water and could effectively remove the surface water of the lignite under a mild condition.When the separation time was 2 min a nd the drying temperature was 85。C, the possible deviation Ep of the difficult separated low rank lignite was 0.051 g/cm3, the surface water removed rate was over 8 0% and the heavy medium quantity ratio sticking on the lignite was 0.26% before the heavy medium removed.