The invention relates to the field of building material preparing, and discloses a method for producing an integrated bamboo wallboard. The method includes the steps of 1, material mixing, wherein polyvinyl chloride resin, calcium powder, a PVC small-tube material, bamboo powder, PE wax, stearic acid AC-1801, a foaming agent, a foaming regulation agent, a calcium-zinc composite stabilizing agent, a toughening agent and dye are placed into a heating mixer to be stirred and then transferred into a cold mixer to be stirred; 2, extrusion molding, wherein the raw materials are transferred into a material barrel of an extrusion molding machine to be heated, enter a flow combining core and then enter a mold to be molded; 3, traction stretching and shaping, wherein a semi-finished product is subjected to traction stretching, and meanwhile vacuumizing shaping is carried out; 4, cutting and high-temperature laminating, wherein a board is cut and finally subjected to high-temperature laminating, and the finished integrated bamboo wallboard is produced. The integrated bamboo wallboard produced with the method is environmentally friendly, high in strength, stable in physical and chemical performance and capable of adsorbing static electricity, and later-period installation and processing of the board are convenient.