The invention discloses an anti-deformation fireproof door with good sealing performance, and relates to the technical field of fireproof facilities. The anti-deformation fireproof door comprises a door frame body, a fireproof outer frame and a top plate, wherein, the fireproof outer frame is rotatably connected to the inner connecting end of the door frame body through hinges, and the top plate is located at the top of the fireproof outer frame. According to the anti-deformation fireproof door with good sealing performance, structural design is reasonable, the compression resistance of the fireproof door is higher compared with a traditional product, the phenomenon that the fireproof door is bent and deformed due to external acting force is effectively prevented, gaps inside and outside the fireproof outer frame are effectively filled through matched use of sealing strips and honeycomb aluminum plates, circulation of smoke and hot air is effectively blocked, comfort of personnel in a house is guaranteed; and compared with the traditional product, the fireproof door can effectively extinguish surrounding fire sources in the first time, the problem that in the prior art, casualties are caused due to the fact that firefighters fail to rescue in time is solved, and the actual use safety of the fireproof door is greatly improved.