Horse stool for controlling thickness and flatness of floor slab

A horse stool for controlling the thickness and flatness of a floor slab relates to the technical field of horse stools, and adopts the technical scheme that the horse stool comprises a body with a trapezoidal cross section, the body comprises a first side wall, the first side wall corresponds to the lower bottom of the trapezoidal cross section of the body, and one side, facing the bottom surface of the body, of the first side wall is provided with a lower-layer steel bar supporting block; an upper-layer steel bar limiting groove is formed in the top face of the body, the extending direction of the upper-layer steel bar limiting groove is perpendicular to the extending direction of the lower-layer steel bar supporting block, and the two ends of the upper-layer steel bar limiting groove extend to the first side wall and the second side wall parallel to the first side wall correspondingly. The height of the body is the same as that of a floor slab. Compared with a common steel bar horse stool in the prior art,