Bed-jig top tool used for temporary supporting and unloading of steel structure

The utility model relates to a bed-jig top tool used for temporary supporting and unloading of a steel structure. The bed-jig top tool used for temporary supporting and unloading of the steel structure comprises stand columns, a supporting point, a main beam, secondary beams and a sliding board, wherein the secondary beams are erected on the main beam in a sliding mode; the stand columns are erected on the secondary beams in a sliding mode; the sliding board is arranged on the stand columns in a sleeved and sliding mode and located above the secondary beams; the supporting point is fixed to the sliding board and comprises a spherical hinge point in the top end and a supporting board which is arranged above the spherical hinge point and used for being matched with the steel structure; the sliding direction of the secondary beams on the main beam, the sliding direction of the stand columns on the secondary beams and the sliding direction of the sliding boards on the stand columns are mutually perpendicular to o