The invention relates to a multifunctional coating barrel, in particular to a multifunctional coating barrel capable of preventing mutual extrusion or collision of coating barrels through protective covers, elastic protrusions and protective protrusions. The multifunctional coating barrel comprises a barrel body. The barrel body is sleeved with a protective cover made of a rubber material, the size of the protective cover adapts to the size of the barrel body, the protective cover is a hollow cylinder, one end of the protective cover is open, the other end of the protective cover is closed, and elastic protrusions are arranged on the outer surface of a position, close to a barrel cover, of the protective cover. By means of the design of the protective cover, the elastic protrusions and the protective protrusions, a certain buffering and protecting effect is achieved, the situation that pits appear on the outer surface of the coating barrel or the outer surface of the coating barrel is damaged due to mutual extrusion or collision of the coating barrels in the transportation process is effectively prevented, and the economic benefits are good; a valve is arranged at the position, close to the bottom, of the barrel body, coating can flow out of the valve conveniently, and coating is saved; and by means of arrangement of universal wheels, the coating barrel can be moved at any time and at any place, and labor is saved.