Middle joist structure for photovoltaic flexible assembly component

The utility model discloses a middle joist structure for a photovoltaic flexible assembly component, which comprises a middle cable rack stand column and side cable rack stand columns, a middle joist is mounted at the top end of the middle cable rack stand column, sliding grooves are formed in the inner side walls of the middle joist, bolts are arranged in inner cavities of the sliding grooves, one end of each bolt is connected with a first clamping block, and the other end of each bolt is connected with a second clamping block. According to the middle joist structure for the photovoltaic flexible assembly component, the first nut on the surface of the bolt is unscrewed, so that the first clamping block is loosened, the first clamping block slides in an inner cavity of the sliding groove, meanwhile, the connecting block is driven to slide, and the first clamping block is clamped in the inner cavity of the sliding groove; therefore, the effects of adjusting the distance between the assemblies and moving the as