The invention discloses an approach bridge for unloading. The approach bridge for unloading comprises piers, a bridge deck supported by the piers, and a supporting frame unit which is arranged on the bridge deck and forms one or more truck passages, wherein the supporting frame unit comprises stand columns perpendicular to the bridge deck, diagonal rods for supporting the stand columns, and an unloading blocking frame located on the outside of the bridge deck; the adjacent two stand columns are spaced apart by a predetermined distance; the diagonal rods are arranged on the front side and the rear side of the corresponding stand column; and the unloading blocking frame is fixed on the bridge deck and is fixedly connected with the supporting frame unit. The approach bridge for unloading disclosed by the invention has the advantages that the approach bridge cannot be shaken when the cargo is loaded and unloaded, the cargo can be more accurately transferred into containers, a larger number of trucks are allowed to load and unload the cargo, and the efficiency is high.