Moistureproof plate with high stability

The utility model discloses a moisture-proof plate with high stability, which comprises a keel frame and two plates, the keel frame is arranged between the two plates, and the keel frame is fixed with the two plates; the keel frame comprises a mounting frame, a plurality of reinforcing pieces are arranged on the two sides of the mounting frame, the reinforcing pieces are parallel to one another and arranged in the length direction of the mounting frame, and the reinforcing pieces on the upper side and the lower side are embedded in the two plates respectively. The composite board has the beneficial effects that the strength of the whole structure can be improved by combining the two layers of boards with the keel frame, the stability of the boards in a humid environment can be effectively improved through the composite structure, the boards can be supported and straightened through the keel frame, deformation of the boards after being affected with damp is avoided, and the keel frame is embedded into the boar