Connecting piece for construction for reducing height of well chamber of existing inspection well

The utility model discloses a construction connecting piece for reducing the height of a well chamber of an existing inspection well, which comprises an upper movable plate and a lower movable plate positioned below the upper movable plate, two grooves are symmetrically formed in the outer surface of the upper movable plate and the outer surface of the lower movable plate, and positioning pieces are arranged above the upper movable plate and below the lower movable plate. Two positioning holes are symmetrically formed in the outer surfaces of the two positioning pieces, and positioning bolts are inserted into the two positioning holes formed in one positioning piece; one end of each of two positioning bolts sequentially penetrates through the two grooves in the upper movable plate, the two grooves in the lower movable plate and the two positioning holes in the other positioning piece to be connected with internal threads of the two positioning nuts. According to the design, the adjustable fixing piece is arra