The invention discloses a fire-retardant, anticorrosive and mothproof coating for restoring an ancient timberwork building. The fire-retardant, anticorrosive and mothproof coating is prepared from the following main components: a wetting agent, a defoaming agent, a film forming agent, an inorganic dispersant, a pigment, filler, an orange peel agent, petroleum asphalt, a cosolvent, cerium oxide, an organosilicon polymer solution, ethyl acetate and water. The fire-retardant, anticorrosive and mothproof coating for restoring the ancient timberwork building, disclosed by the invention, has the advantages of low cost, wide sources of raw materials and excellent fire-retardant, anticorrosive and mothproof effects; in addition, after the ancient timberwork building is restored, cracks on the surface of the ancient building and special vicissitude sense endowed by time still can be kept, and further a sense of repairing the old as old is obtained; the fire-retardant, anticorrosive and mothproof coating is an environment-friendly and safe novel building material.