House building heating system

The invention discloses a house building heating system, and belongs to the field of buildings. A heat preservation sandwich wall communicating with a delivery conduit is arranged on the side wall ofa house main body, a return airway which communicating with an indoor sun room and the interior of the house main body correspondingly is arranged on the side wall of the house main body, a communicating pipe is arranged at the top of the room, one end of the communicating pipe communicates with the heat preservation sandwich wall, the other end of the communicating pipe communicates with the exterior of the house main body, an air outlet is formed in the communicating pipe, an air outlet fan blowing downwards is arranged at the air outlet, a second lifting plate is connected with the inner wall, relative to one side which the communicating pipe communicates with the exterior of the house main body, of the room in a up-down sliding mode, the second lifting plate extends into the communicating pipe and controls the