The utility model provides a concrete protection layer controlling means which characterized in that: concrete protection layer controlling means include the reinforcing bar cage, the special wedge in control protection layer, reinforcing bar stand owner muscle, inner formword, wherein: the reinforcing bar cage is the cuboid columnar structure, and inside has the inner formword, the inside of inner formword has many reinforcing bar stand owner muscle, and the horizontal spacing is 50~150 millimeters, and the special wedge in control protection layer has been arranged to the position at four angles between reinforcing bar cage and the inner formword. The utility model discloses an advantage: concrete protection layer controlling means, inner formword and reinforcing bar cage can be controlled to the special wedge in wherein control protection layer, go up thickly, thin down, realize following function: the design can be guaranteed and the protective layer gauged distance is given, can guarantee that protective layer four sides distance is even, can guarantee special wedge can not the drunkenness in the construction with fall down, special wedge installation back, shang mian the height can not influence and install the rag bolt support no longer than edge on the foundation forms.