Near-zero-energy-consumption fabricated building system in cold region

The invention discloses a near-zero-energy-consumption fabricated building system in a cold region, and relates to a building system in the cold region. The invention aims to solve the problem that buildings in cold regions pay attention to heating and heat preservation design, so that the living comfort of the buildings in summer is reduced. A south-north wall module is installed on a ground module, two side wall modules are symmetrically installed on the two sides of the south-north wall module, a north cellar module is installed on the north side of the south-north wall module, a south cellar module is installed on the south side of the south-north wall module, a roof module is installed on the top of the south-north wall module, and a ventilation module is inserted into the south-north wall module. A top ventilation opening of the ventilation module is located on the outer side of the roof module, an underground air layer is arranged in the ground module, and the north cellar module and the south cellar m