Novel wall body sealing pipe fitting

The utility model discloses a novel wall body sealing pipe fitting, comprising a pipe body, wherein one end extending out of a room, of the pipe body is sleeved by an outer tuyere pipe fitting of which an opening is in a downward semi-spherical shape, so that the effect on air inlet caused by an outdoor environment is reduced. The pipe body is sleeved by a soft fixing sleeve, a soft expansion sleeve and an adjusting nut, which are sequentially connected with one another; the soft fixing sleeve is fixed on the pipe body, so as to play an axial support role in the soft expansion sleeve; the adjusting nut sleeves the pipe body and is in threaded connection with the pipe body; the soft expansion sleeve is pressed by axial movement, along the pipe body, of the adjusting nut, so that the radical direction of the soft expansion sleeve is increased; accurate sealing and fixing between the pipe fitting and a wall body are achieved; loss of energy is avoided; the wall body and the novel wall body sealing pipe fitting are firmly installed and is high in safety.