Abstract: Through the mineral pressure observation work of 3702 fully-mechanized face in thin coal seam in Zhaoguan Coal Mine, on the basis of analysis of mineral pressure observation data, combining with the mine pressure theory and field experience, the motion and caving law in the recovery process, deformation law of surrounding rock and the influence scope of advanced pressure are obtained. The roof type is determined, which provides guidance for the safe and efficient recovery of coal resources in similar geological conditions.