Energy-saving natural gas tunnel kiln

The utility model provides an energy-saving natural gas tunnel kiln, relates to the technical field of brick making, and solves the problems that an existing device is low in overall operation efficiency and flexibility in use, and a preheating chamber in the same natural gas tunnel kiln needs to consume certain heat in the operation process. Comprising a kiln body, a preheating chamber is arranged on the inner side of the kiln body, a combustion chamber is arranged on one side of the preheating chamber, a cooling chamber is arranged on the side, away from the preheating chamber, of the combustion chamber, and the kiln body, the preheating chamber, the combustion chamber and the cooling chamber are of an integrated structure; and a recovery mechanism I and a recovery mechanism II are arranged in the cooling chamber in a manner of penetrating through the outside. According to the device, heat in the cooling chamber is effectively recycled into the combustion chamber through the first recycling mechanism and re