The invention relates to a stacked exterior wall with a multilayer structure. The stacked exterior wall comprises a plurality of wallboards which are nested together from bottom to top to form the exterior wall. Each wallboard comprises an outer board, an inner board and a middle board, wherein the outer board and the inner board are positioned on two sides, the middle board is positioned between the outer board and the inner board, upper ends of the outer board and the inner board are provided with first clamping parts respectively, lower ends of the outer board and the inner board are provided with second clamping parts respectively, the first clamping parts and the second clamping parts can be matched in shape and tightly clamped together, the upper end of the middle board is provided with a trapezoidal head, the lower end of the middle board is provided with a trapezoidal groove higher than the trapezoidal head, and the trapezoidal head can be clamped in the trapezoidal groove. As each wallboard comprises an inner layer, a middle layer and an outer layer, the exterior wall can be assembled by stacking the wall boards layer by layer without structural distinguishing of each layer, so that convenience in assembly is achieved. In addition, the inner layers, the middle layers and the outer layers of the wall boards own form integral inner, outer and middle layer structures of the exterior wall, and functions of water resistance, thermal insulation and the like corresponding to each layer structure are unaffected.