Cutting blade for crushing rubber

The cutting blade comprises a cutting blade body, fixed clamping holes are formed in the front end and the rear end of the cutting blade body, movable clamping blocks are arranged at the outer ends of the fixed clamping holes, and replacement grooves are formed in the positions, corresponding to the outer end of the cutting blade body, of the outer ends of the movable clamping blocks. A replacement groove is formed in the center of the cutting blade body, a replacement tool bit is arranged at the outer end of the replacement groove, a fixing ring is arranged in the center of the cutting blade body, a protruding ring is arranged at the upper end of the fixing ring, a rotating groove is formed in the outer end of the protruding ring, a rotating ring is arranged at the outer end of the rotating groove, an upper cover is arranged at the outer end of the rotating ring, and a fixing hole is formed in the upper end of the upper cover. According to the cutting blade for rubber crushing, the replacement blades with di