The utility model relates to a cluster hangs instrument of girder steel, include: the balancing pole, the structure of balancing pole is lifted by crane in the confession, lifts by crane the top that the balancing pole was located to the structure, the cluster that supplies the cluster to hang the girder steel hangs the structure, and the cluster hangs the bottom that the balancing pole was located to the structure, and set firmly in the bearing structure of the bottom of balancing pole. The utility model discloses cluster hangs instrument of girder steel establishes through the top at the balancing pole and lifts by crane the structure, establishes with the rope hook and to lift by crane the structure to be connected with the couple of tower crane, thereby can lift by crane the balancing pole, establish the cluster in the bottom of balancing pole and hang the structure, hang a plurality of girder steel clusters through the rope and hang under the structure at the cluster, hoist the operation together to can very big degree improve work efficiency, reduction of erection time, reduce construction cost. Unload when not using behind the hook, usable bearing structure directly places in ground, conveniently stacks.