Adjusting assembly and plate buckle frame beam bottom formwork supporting device

The utility model relates to the technical field of building construction, in particular to an adjusting assembly which comprises a double-channel steel bracket, two channel steels of the double-channel steel bracket are connected through channel steel restraining bolts, the double-channel steel bracket is connected to a second vertical rod connecting disc in a lap joint mode, and the second vertical rod connecting disc is arranged on a rod body of a bracket through screw rod in a sleeved mode. An adjustable bracket is arranged at the top end of the bracket through screw rod, a first vertical rod connecting disc is arranged on a rod body of the bracket through screw rod in a sleeving manner, a horizontal cross rod bolt is movably inserted into a notch of the first vertical rod connecting disc, and the horizontal cross rod bolt is fixed on the horizontal cross rod; the adjusting assembly and the disc buckle frame beam bottom formwork supporting device have the advantages that the double-channel steel joists ar