The utility model discloses an automatic fire extinguishing cigarette. Cigarette comprising a cigarette body, a water bag and a through hole blocking piece are arranged between the cigarette body andthe filter tip. The water bag is located on one side of the cigarette body, a through hole blocking piece is arranged on the other side of the water bag and located on one side of the filter tip, thewater bag, the through hole blocking piece and the filter tip are all wrapped at the tail end of the cigarette body, the width of the water bag is smaller than that of the through hole blocking piece,and the water bag is made of a plastic film and can melt when meeting fire. According to the automatic fire extinguishing cigarette, the water bag is arranged at the tail of the cigarette body, the cigarette body is smoked to be burnt to a designated position, a kindling material burns through the water bag, water in the water bag extinguishes the kindling material, and therefore the purpose of automatically and rapidly extinguishing the cigarette body is achieved; according to the device, the through hole blocking piece made of the fiber material is arranged behind the water bag, so that when the cigarette body is not completely extinguished, flame retarding can be conducted in time, a kindling material is prevented from burning the filter tip, and then pungent smells are avoided.