The invention belongs to the technical fields of bamboo and rattan material processing methods, and particularly relates to broad-spectrum mildew-proof paint for a bamboo and rattan material. The broad-spectrum mildew-proof paint is prepared from the following raw materials in parts by weight: 55 to 65 parts of acrylate-modified polyurethane emulsion, 2 to 8 parts of borax, 12 to 16 parts of a mildew-proof modifier, 1 to 2 parts of an emulsifier, 1 to 3 parts of a stabilizer, and 0.4 to 0.8 part of a pH (potential of hydrogen) regulator. Compared with the prior art, the broad-spectrum mildew-proof paint has the advantages that by reasonably proportioning the mildew-proof modifier, the mildew-proof agent can be effectively bonded with the acrylate-modified polyurethane emulsion, the homogenizing property of the coating is improved, and the density and film forming property are better; the broad-spectrum property is stronger, and the paint is suitable for different use environments.