The invention relates to a construction robot for environment-friendly wall decorations, which comprises an adjusting device, a telescopic device, a connecting plate, a cutting device, a dual-purposedevice and a shearing device, wherein the telescopic device is installed on the front side of the upper end of the adjusting device, and the shearing device is installed at the lower end of the telescopic device, the connecting plate is installed at the front end of the telescopic device, the shearing device is installed at the upper end of the connecting plate, and the dual-purpose device is installed at the lower end of the connecting plate. The invention can solve the existing problems: in case of seaming anti-mold wallpapers, personnel are required to push the excess paper material betweenthe two wallpapers into a convex shape by means of a ruler, and then cut the paper material with a cutter, and a plurality of people are needed to cooperate; in case of cutting, a manual cutting is not flush, and the cutting is not complete, and the wallpapers may be pulled and damaged or stretched due to personnel not pressing the wallpapers stable; and in case of cutting the redundant wallpaperat the skirting line, as the skirting line is too low, the personnel will have difficulties to cut even the personnel bend down, thereby resulting in a long time consumption, a large labor intensityand a low efficiency etc.