Device for guaranteeing installation of fence piece on top plate reinforcing steel bar face

A device for guaranteeing installation of a fence piece on a steel bar face of a top plate comprises a vertical supporting rod and a supporting plate. The supporting plate is horizontally arranged at the top of the top plate steel bar and corresponds to the position of the enclosure piece to be installed. A steel bar clamping ring detachably connected with a top plate steel bar is arranged at the bottom of the supporting plate. Through holes are formed in the positions, close to the four corners, of the supporting plate respectively. The number of the vertical supporting rods is four, the vertical supporting rods are arranged in the four penetrating holes in a penetrating mode respectively, and each vertical supporting rod is provided with an external thread. Adjusting nuts are arranged at the positions, located at the top and the bottom of the supporting plate, of the vertical supporting rod correspondingly. A horizontal support is arranged at the bottom of the vertical supporting rod; a mounting seat is arr