The invention discloses a separated material supply tool, and belongs to the technical field of bridge and tunnel construction. The tool comprises an I-beam, a truss trolley, rollers, a guide rail, spraying material tanks and a spraying robot; the spraying material tanks are connected with the spraying robot, the spraying material tanks and the spraying robot are installed on the truss trolley, and the rollers are installed at the bottom of the truss trolley; the guide rail is arranged on the I iron, the truss trolley moves along the guide rail through the rollers, and the spraying robot slides on the truss trolley to work. The separated material supply tool can meet the requirement for large-surface automatic spraying materials of a large-scale steel structure, materials which are arranged on the periphery of the robot in an integrated mode are supplied in time, and the materials and time are saved.