Floor slab hole reserving mechanism

The utility model provides a floor hole reserving mechanism which comprises a main body shell, a mounting plate is arranged below the main body shell, a mounting groove is formed in the bottom face of the main body shell, and the mounting plate is clamped in the mounting groove. A main body cover plate is arranged above the main body shell, a connecting groove is formed in the main body cover plate, a first bearing is arranged in the connecting groove, and the mounting screw rod penetrates through the first bearing and is arranged on the mounting plate in a penetrating manner; a plurality of groups of fixing grooves are formed in the main body cover plate, fixing assemblies are arranged in the fixing grooves, a plurality of groups of mounting clamping grooves are further formed in the main body cover plate, buckle assemblies are arranged in the mounting clamping grooves, and one ends of the buckle assemblies are clamped on the fixing assemblies. According to the floor hole reserving mechanism, the shape and s