Safety ladder cage attached bolt type connecting piece

The utility model discloses a safety ladder cage attaching bolt type connecting piece which mainly comprises a connecting steel pipe, an L-shaped thread head reinforcing steel bar, an embedded sleeve and a diagonal bridging, a lantern ring is installed at one end of the connecting steel pipe, and the L-shaped thread head reinforcing steel bar is sleeved through the lantern ring. The L-shaped threaded head reinforcing steel bars are in threaded connection with the embedded sleeves embedded in the building body, the ladder cage and the building body can be rapidly connected together, rapid building of the ladder cage is achieved, during dismounting, a worker only needs to stand on one side of the ladder cage to rotate the connecting steel pipes and the cross bridging which are connected together through the movable fasteners and close to one end of the building, and the ladder cage can be rapidly dismounted. The connecting steel pipe can be screwed off from the building body without manually climbing on the bui