Cement cushion block for controlling thickness of concrete protection layer

The utility model relates to a cement cushion block for controlling the thickness of a concrete protective layer, which is a solid body prefabricated by cement mortar, the cement cushion block is of a cylinder structure, the second bottom surface of the cement cushion block is a horizontal plane, the first bottom surface of the cement cushion block is an inclined plane, and a round hole is dug in the center of the cylinder. An opening communicated with the round hole is formed in the cylinder, and the round hole and the opening are through holes which are through up and down. Compared with the prior art, the internal circular hole is communicated with the outside through the opening, so that the cement cushion block can be installed after a steel reinforcement framework is completed, and the manufacturing of the steel reinforcement framework cannot be interfered. During installation, the stirrup only needs to be placed into the inner round hole through the opening, time and labor are saved, the installation p