The utility model provides a locating device for a corrugated steel web. The locating device for the corrugated steel web comprises two linear supporting parts, wherein the supporting parts are parallel to each other, and two basket screws which form square crossing are connected between the two supporting parts. Two ends of each basket screw are respectively connected with one end portion of one supporting part. The end portions of the supporting parts are fixedly connected with gusset plates. The end portions of the basket screws clamp U-shaped plates, and the U-shaped plates are connected with the gusset plates through bolts. The bottom portions of the U-shaped plates are provided with holes, and the end portions of the screws are provided with clamping tables. The basket screws penetrate through the holes of the U-shaped plates, and are clamped with the holes through the clamping tables. The locating device for the corrugated steel web is simple in structure, convenient to operate, and capable of being used repeatedly, and improves locating installing efficiency of the corrugated steel web.