Wall connecting piece

The invention relates to the technical field of outer frame installation, and particularly discloses a wall connecting piece which comprises a vertical steel pipe connected with a main body structure and vertically arranged, a horizontal steel pipe horizontally arranged and connected with an outer frame, and a connecting fastener used for connecting the horizontal steel pipe and the vertical steel pipe. The connecting fastener comprises a first fastener body, a second fastener body hinged to the first fastener body, a hemispherical hinge structure connected with the first fastener body and the second fastener body, and an abutting piece installed in the second fastener body. And the length of the fastener II along the axial direction is twice of the length of the fastener I along the axial direction. The contact area of the second fastener and the horizontal steel pipe is increased, the abutting piece is arranged between the horizontal pipe and the inner side of the second fastener, the pressure between the s