Open type floor support plate with lap joint structure

The utility model relates to the technical field of building floor bearing plates, in particular to an open type floor bearing plate with a lap joint structure, which comprises a main steel plate, and the main steel plate comprises a first connecting plate and a second connecting plate. The open type floor support plate with the lap joint structure is composed of the first connecting plate and the second connecting plate, the assembling frames used for installation are arranged at the front end and the rear end of the first connecting plate and the front end and the rear end of the second connecting plate respectively, the trapezoid supporting frames used for improving the assembling stability are arranged in the connecting faces of the assembling frames, and the assembling stability between the floor support plates is improved; the installation is convenient; limiting clamping grooves matched with the assembling frame are formed in the front end and the rear end of the trapezoid supporting frame, and the int