Waterproof and vapor-proof material for ultralow-energy-consumption building and preparation method of waterproof and vapor-proof material

The invention relates to the technical field of building materials, in particular to a waterproof and vapor-proof material for an ultralow-energy-consumption building and a preparation method of the waterproof and vapor-proof material. The invention relates to a waterproof vapor-proof material for an ultra-low energy consumption building. The waterproof vapor-proof material is prepared from the following components in parts by weight: 60 to 68 parts of polyvinyl butyral glue, 1 to 10 parts of urea, 5 to 10 parts of fly ash floating beads, 0.2 to 1.0 part of sodium silicate, 0.5 to 1.5 parts of propylene glycol, 0.1 to 0.5 part of liquid paraffin and 20 to 30 parts of deionized water. After the waterproof and vapor-proof material forms a film, the film has excellent waterproof and vapor-proof properties, the tensile strength of the film formed after the material is dried is greater than or equal to 1.5 MPa, the elongation at break of the film of the waterproof and vapor-proof material is greater than or equal