Coating winding drum with embedded hardware

The coating winding drum with the hardware embedded inside comprises an outer drum, an inner drum matched with an inner ring of the outer drum, a first connecting drum and a second connecting drum, a plurality of arc-shaped through grooves are distributed in the wall face of the outer drum in an annular array mode, and each of the first connecting drum and the second connecting drum comprises a sleeve part and a lantern ring part connected to one end of the sleeve part. Arc-shaped notches corresponding to the arc-shaped through grooves are distributed in one end of the lantern ring part in an annular array mode, connecting cylinders are arranged on the arc-shaped notches, connecting rods matched with the inner diameters of the connecting cylinders are detachably connected between the two opposite connecting cylinders, and the connecting rods are arranged in the arc-shaped through grooves; the inner cylinder is inserted into the inner ring of the outer cylinder, the two ends of the inner cylinder extend out of