The invention relates to a mechanism for attaching a building integral elevating scaffold to a steel beam, comprising a hard tauting bearing, a guiding device bearing, a suspension arm steel beam bearing, an anchor ear and a diagonal drawing bar bearing; wherein the anchor ear comprises an upper steel plate, a lower steel plate and four bolts; the upper steel plate is welded with the suspension arm steel beam bearing; the lower part of the lower steel plate is fixedly connected to the diagonal drawing bar bearing; two sides of the suspension arm steel beam bearing are respectively welded withthe hard tauting bearing and the guiding device bearing; the upper steel plate and the lower plate are connected with each other through the four bolts distributed on four corners and nuts. The invention solves the problem that a traditional integral elevating scaffold can not attach to a steel structure and ensures a wider application range of the integral elevating scaffold. The mechanism comprises components, such as a steel beam anchor ear, a diagonal drawing bar joint point, a load-bearing and falling-resistance steel beam bearing, the hard tauting bearing, a lifting guiding bearing, andthe like, is convenient to disassemble and assemble and is reusable.