Efficient cooling self-cleaning chain wheel

The invention discloses an efficient cooling self-cleaning chain wheel. The chain wheel is composed of a chain wheel body and chain teeth, wherein the chain teeth are provided with chain joints and thus can stably enter or retreat from meshed tooth shapes, a groove is formed between two opposite work faces of every two adjacent chain teeth, the groove bottoms of the grooves and the tooth root circles of the chain teeth are tangent, and the width of the chain teeth is larger than the thickness of the portion, located on a chain tooth part, of the chain wheel body. Preferentially, the two sides of the thickness part, where the chain wheel body is located on the chain tooth part, of the chain teeth protrude out of the chain wheel body; a torque transmission structure is arranged on the chain wheel body. The efficient cooling self-cleaning chain wheel has the advantages that the self-cleaning performance of the chain wheel is good, the cooling area is large, the cooling effect is good, and service life is long; the structure is simple and manufacturing cost is low.