The invention relates to the field of building template connection supporting, and relates to a tubular connecting piece. The tubular connecting piece solves the problem that a tubular connecting piece is not connected with a steel
wire mesh piece in the prior art. The tubular connecting piece comprises a
pipe body. An axial channel of the
pipe body penetrates through the
pipe body to form openings in the two ends of the pipe body. A first limiting piece, a second limiting piece and a connecting mechanism are arranged on the outer side wall of the pipe body. The connecting mechanism and the first limiting piece are correspondingly located on two sides of the second limiting piece. The steel
wire mesh piece can apply a tensile force to an outer wall layer, the firmness of the combination ofthe outer wall layer and a
thermal insulation layer is enhanced, and the outer wall layer is prevented from being separated from the
thermal insulation layer. The cast-in-place concrete built-in
thermal insulation wall body comprises the inner wall layer, the outer wall layer, the thermal
insulation layer located between the inner wall layer and the outer wall layer and a tubular connecting piece. The pipe body penetrates through the inner wall layer, the thermal
insulation layer and the outer wall layer. The steel
wire mesh piece is arranged in the outer wall layer. A first end piece and a second end piece are located on the two sides of the steel wire mesh piece correspondingly. The thermal
insulation layer is located between the first limiting piece and the second limiting piece.