Connecting component and steel structure building beam

The utility model relates to the technical field of steel structure building, in particular to a connecting component and a steel structure building beam, which comprises a baffle, a moving block and a fixed plate, the moving block is U-shaped and is positioned between the baffle and the fixed plate, one end of the fixed plate is fixedly mounted on the side wall of one end of the moving block, the baffle is positioned on the other side of the moving block, and the moving block is fixed on the baffle. The elastic block is elastically connected with the moving block; a limiting plate at the lower end of a supporting beam is clamped to the upper end of a connecting column and located between two barrier strips, then a hand-screwing bolt is screwed out of a through hole, under the acting force of a spring, a movable block and a fixed plate are pushed inwards, the fixed plate is inserted into an inserting barrel in a sliding mode, the spring is in a balanced state at the moment, and then the hand-screwing bolt is