The invention discloses a drum of a thin coal seam shearer, which is composed of an end disc, a spiral blade, a drum hub, a pick and a gear seat, etc., and the diameter of the drum hub increases in a hyperbolic sine form from the bottom of the drum to the end disc. The angle between the section of the helical blade and the inner cylinder of the hub is non-right angle, the coal-facing surface of the helical blade is an arc surface, and the pick seat is fixed on the coal-facing surface of the helical blade by bolts, so that only the alloy head of the pick is exposed Outside the envelope of the helical blade. According to the movement and distribution rules of the coal body during the process of being shipped, the drum combines the main reasons for the wear and tear failure of the current drum, and combines the special hub contour line of the present invention, the arc-shaped skewed spiral blade and the detachable pick tooth seat, so that The coal loading rate of the drum is increased by more than 20%, and the life of the drum is increased by more than 6%. It is suitable for mining thin coal seams with a coal seam thickness of less than 1.3 meters and a strike angle of less than 20°. The drum has the advantages of compact structure, convenient use, good coal charging effect and long service life.