Preparation method of fireproof and waterproof floor

The invention discloses a preparation method of a fireproof and waterproof floor, which comprises the following steps: sequentially carrying out one-time hot press molding on melamine paper, a high-density fiberboard and balance paper from top to bottom at the hot press temperature of 190-210 DEG C under the pressure of 3-5 MPa for 30-40 seconds; static curing is conducted, specifically, the hot-pressed floor is placed at the room temperature to be cured for 7-10 d, and then grooving, beveling and edge sealing are conducted; finally, finished products are inspected, packaged and warehoused. The fireproof and waterproof high-density fiberboard is adopted as a base material, the fireproof performance of a wallboard main body component is guaranteed, in addition, melamine paper and balance paper are selected as the surface decoration layer and the back balance layer, the thickness of the melamine paper and the balance paper is only 0.1-0.2 mm, the A-level fireproof requirement can be completely met, and compared