Connecting piece used for floor edge protection piece

The invention provides a connecting piece used for a floor edge protection piece. The connecting piece comprises a through-wall bolt and a nut matched with the tail portion of the through-wall bolt, wherein the head portion of the through-wall bolt is fixedly connected with a limiting casing pipe. After the structure is adopted, a cross bar of the edge protection piece is sleeved with the limiting casing pipe, fatigue can not happen to the limiting casing pipe, the connecting piece used for the floor edge protection piece is fixed to a wall when the through-wall bolt penetrates through the wall to be matched with the nut, and the reliability of the edge protection piece is improved.