The invention discloses a dewatering device for a wool roll special for a papermaking felt, the dewatering device comprises an electric heating fan (1) and an arc-shaped plate (3), wherein the wool roll (2) is rotationally connected to the arc-shaped plate (3); an adhesive strip (5) is arranged on one end, which faces forward to the papermaking felt (4), of the arc-shaped plate (3); a water absorption strip (6) is arranged on one end, which faces backward to the papermaking felt (4), of the arc-shaped plate (3); and the water absorption strip (6) is attached to the outer peripheral wall of thewool roll (2); the inn peripheral wall of that arc-shaped plate (3) is provide with a water guide groove (7), the arc-shaped plate (3) is provided with an air inlet groove (8), the air inlet groove (8) penetrates through the diameter direction of the arc-shaped plate (3), the outer peripheral wall of the arc-shaped plate (3) is provided with an air cover (9) at the position of the air inlet groove (8), and the air cover (9) is communicated with the air outlet of the electric heating fan (1) through an air pipe (10). The dewatering device for the wool roll special for the papermaking felt hasa more obvious dewatering effect.