The invention relates to a mounting structure of an irregular double-curved-surface strip-shaped decorative wall surface model. The mounting structure of the irregular double-curved-surface strip-shaped decorative wall surface model comprises a connecting clamp, a first corner connector, an adjustable piece, a second corner connector and a wall surface connecting piece; the connecting clamp is connected with the first corner connector; the wall surface connecting piece is connected with the second corner connector; the adjustable piece is provided with a strip-shaped hole and a positioning hole, and is connected with the second corner connector through a first positioning assembly; the first positioning assembly penetrates in the strip-shaped hole; and the first corner connector and the adjustable piece penetrate in the positioning hole through a second positioning assembly and then are connected with each other. By the mounting structure of the irregular double-curved-surface strip-shaped decorative wall surface model, labor can be saved, and mounting efficiency is improved. Besides, the shortcoming that mounting radian of a cambered surface of a facing square tube is difficult to control is overcome. The mounting structure not only can be adjusted in the transverse direction, but also can be adjusted in the longitudinal direction. The direction of the facing square tube can also be adjusted easily, and regional connection of the facing square tube is natural and smooth.