The invention discloses a blade of a conveying belt rubber peeling machine. The blade comprises a blade body (14), a flat edge (12) and a vertical edge (11); the vertical edge (11) and the flat edge (12) are approximately vertical or form a certain inclined angle; and the vertical edge (11) protrudes the front of the flat edge (12). After the structure is adopted, the blade of the conveying belt rubber peeling machine with smaller cutting resistance can slice rubber to be peeled from other parts, so the cutting resistance is smaller.