Large-caliber thick-wall PE pipe extrusion die

The utility model discloses a large-caliber thick-wall PE (Poly Ethylene) pipe extrusion die, which relates to the technical field of PE pipe production, solves the problem of large eccentricity of the wall thickness in the existing pipe production, and reduces the production difficulty of large-caliber thick-wall pipes, and adopts the technical scheme that the large-caliber thick-wall PE pipe extrusion die comprises a first die body, a second die body and a third die body which are fixedly connected in sequence, the first die body is located on the side of the feeding port, an air collecting ring is arranged at the end, close to the feeding port, of the first die body, and the air collecting ring communicates with the interiors of the first die body, the second die body and the third die body through a first ventilation channel, an air duct and a second ventilation channel which communicate in sequence; a first heating sheet with a fan is fixedly arranged on the outer wall of the first mold body in an annula