The invention discloses a multifunctional furring brick which consists of a finishing coat, a multifunctional layer, and a bonding layer. The multifunctional layer is manufactured and molded at a time with multifunctional liquid and foaming equipment. The finishing coat and the bonding layer are manufactured on the upper face and the lower face of the multifunctional layer respectively. The multifunctional liquid adopts polyfunctionality polyether glycol, polyester polyol prepolymer, vegetable oil polyhydric alcohol and hydramine as initiators, and polyether glycol, a fire retardant, a foam uniformizing agent, a foaming agent, postassium acetate, triethylenediamine, acetal mixture, a delaying catalyst, an ultraviolet absorbent and isocyanate as raw materials. The finishing coat can be an ordinary finishing coat, a fashionable finishing coat, a luxurious finishing coat or a fireproof finishing coat as required. The multifunctional furring brick has the characteristics of energy conservation, water resistance, decoration and portability. Wet land construction with the multifunctional furring brick can be carried out as the construction with ceramic mosaic and porcelain facing bricks, and the multifunctional furring brick can also be cast with concrete in a molding board. In addition, the multifunctional furring brick can also be bonded with an adhesive. The process is simple and operation is quick. The multifunctional furring brick integrates a plurality of functions, such as decoration, thermal insulation, water resistance and imperviousness, antisepsis, sound insulation, light weight, hardness and so on.