The invention discloses a method for treating iron slag at dead angles of an iron plant. In the method, a stokehold crane is provided with a suspension crane and the suspension crane is used for treating the iron slag at the dead angles. The method has the advantages of solving the problem of difficult treatment of the iron slag at the dead angles well, ensuring normal iron discharge of a blast furnace, greatly reducing labor intensity in the stokehold of the blast furnace and improving working conditions of workers and labor efficiency.