Box door sealing structure of high plain steam box

The utility model discloses a box door sealing structure of a high plain steam box, one side edge of a box door is hinged to the corresponding side edge of a box body, the box body is provided with a first matching surface opposite to the box door, the box door is provided with a second matching surface opposite to the box body, and the first matching surface and the second matching surface are matched with each other. A circle of sealing ring clamping groove matched with the box door is formed in the first matching surface; and a sealing ring with a T-shaped cross section is clamped in the sealing ring clamping groove. Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: firstly, an arc contact surface of a traditional sealing strip is abandoned and replaced by a toothed plane, so that the processing precision of a door frame of a sheet metal box body can be reduced, the contact area is increased, and the sealing performance is improved; and se