The invention discloses a multilayer coating and permeating method in papermaking technologies. The multilayer coating and permeating method is characterized by comprising steps of (1), preparing materials comprising, by weight, grafted modified bentonite, calcined kaolin, gypsum, binders, latex, surfactants, anti-ultraviolet agents and deionized water; adding the grafted modified bentonite, the calcined kaolin, the gypsum, the binders, the latex, the surfactants and the anti-ultraviolet agents into the deionized water; uniformly stirring and mixing the grafted modified bentonite, the calcined kaolin, the gypsum, the binders, the latex, the surfactants, the anti-ultraviolet agents and the deionized water to obtain papermaking coating; coating the papermaking coating on body paper by the aid of coating scrapers to form coated layers.