Control tool capable of adjusting thickness and flatness of floor slab

The utility model discloses a control tool capable of adjusting the thickness and flatness of a floor slab. The control tool comprises a vertical rod, the outer side of the vertical rod is connected with a steel chisel in a sliding mode, one end of the steel chisel is fixedly connected with a steel sheet, the outer side of the vertical rod is provided with a limiting groove matched with the steel sheet for use, and one end of the vertical rod is fixedly connected with a disc bottom sheet. The steel chisel has the advantages that the function of controlling the thickness of a floor slab is achieved by adjusting the length of the steel chisel and the graduated scale, and the problem that a plurality of steel chisels are needed for control when concrete with different slab thicknesses is poured is solved; when concrete is poured, a steel chisel is inserted into the concrete to form a circular reference surface on the top of the concrete, large-area surface finishing and leveling are carried out on the surface by