The invention discloses a scaffold rust removal device for bridge construction. The scaffold rust removal device structurally comprises lock catches, a scaffold, a through hole, a handle, a hinge anda rust removal device body; the scaffold penetrates through the through hole and transversely penetrates through the rust removal device body, one end of the rust removal device body is connected withthe lock catches, and the hinge is movably connected to the other end of the rust removal device body, and the handle is welded on the lower surface of the front end of the rust removal device body;and the rust removal device body is composed of gear speed increase transmission devices, a rust removal liquid self-penetrating type clamp hoop, a hoop supporting rod, steel wire brush driving devices, reciprocating motion type rust removal wiping devices, a rust removal device body outer shell and a rust remover. According to the scaffold rust removal device, through the mutual combination of the components, the rust removal work on the surface of the scaffold can be completed only by manual operation in the working process of the device, moreover, the rust removal efficiency of the device is high, the operation is convenient, the energy is saved, the environment is protected, and the practicability is high.