The invention relates to a setting-out device, in particular to a lime setting-out device for road construction. The lime setting-out device for the road construction has relatively high flexibility,is relatively uniform in line drawing, and is not prone to causing waste in the operation process. The lime setting-out device for the road construction comprises a cart, a bracket, a discharging hopper, a feeding cylinder, sloping plates, a cylindrical frame body, a discharging cylinder, a mounting plate, a motor, a first rotating shaft, a first bearing seat, helical blades and the like. The bracket is arranged on the right portion of the upper side surface of the cart, and the discharging hopper is installed at the tail end of the bracket. The discharging hopper is located directly above thecart, and the feeding cylinder is arranged at the lower end of the discharging hopper. The lime setting-out device achieves the effects that flexibility is relatively high, line drawing is relativelyuniform, and waste is not prone to being caused in the operation process. By arranging the cart, the lime setting-out device can be flexibly moved, and the effect of enhancing the flexibility is achieved. By arranging a receiving hopper, lime powder can flow out more uniformly, and the relatively uniform effect of line drawing is achieved.