The utility model provides a cylinder head of engine and engine, the engine is including having the cylinder body in at least one cylinder hole, is positioned the piston in the cylinder body and is configured as to attach the cylinder head that connects to the cylinder body in the mounting surface department of cylinder body, the cylinder head sets up on the mounting surface of cylinder head including the mounting surface that corresponds, first valve receiving part and second valve receiving part, each valve receiving part, and the bridge part of setting between first valve receiving part and second valve receiving part sets up at least one the partly at least passageway for passing the bridge part to and the heat transfer that is positioned in at least one passageway is personally experienced sth. Part of the body, the heat transfer body has first thermal conductivity, and wherein, the cylinder head is formed by the mother metal that has the second thermal conductivity. The utility model discloses it enough reduces the bridge part and the difference in temperature between the structure on every side to locate heat transfer physical stamina in the cylinder head to reduce the damage that the bridge part is aroused by the thermal stress.