Fireproof door

The utility model belongs to the technical field of ships, and discloses a fireproof door which is characterized in that a first door leaf of the fireproof door is provided with a fire-fighting opening, the edge of the fire-fighting opening is fixedly provided with a first limiting plate, the first limiting plate extends out of the fire-fighting opening and is parallel to the first door leaf, the fire-fighting opening is internally provided with a small fire-fighting door, and the small fire-fighting door is rotatably connected with the first door leaf; in the process of closing the small fire-fighting door, when the end face of the small fire-fighting door is rotated to the position parallel to the first door leaf, the small fire-fighting door and the first limiting plate are in an abutting state or an attaching state, then the effect that the first limiting plate limits the small fire-fighting door is achieved, and the situation that the small fire-fighting door is damaged in the production process is omitt