Auto-secretion type blade icing prevention device

The invention provides a self-secretion type blade icing prevention device. Comprising a box body (1), a piston (2), an oil storage area (3) and a plurality of memory metal springs (4), a super-hydrophobic coating (6) and an anti-freezing oil layer (7) are arranged on the outer surface of the box body (1); the oil storage area (3) is arranged in the box body (1); a plurality of memory metal springs (4) are arranged in the oil storage area (3); the piston (2) is arranged below the oil storage area (3); a plurality of permeation holes (5) are formed in the outer surface end, provided with the super-hydrophobic coating (6) and the anti-freezing oil layer (7), of the box body (1); the left side and the right side of the box body (1) are respectively provided with a feeding hole (8). The anti-freezing oil in the oil storage area is uniformly distributed on the upper surface of the box body through the permeation holes under the action of the memory metal spring and the piston to form a double-layer protection laye