The invention discloses a power battery thermal control box body which is characterized in that a box body for accommodating power battery packs is provided; a refrigeration compartment and a battery assembling chamber are respectively formed in the box body; a fan is adopted to enable cold generated from an evaporator to flow in longitudinal air flow channels; square batteries are formed into the battery packs which are overlapped to form battery rows in the battery assembling chamber; the battery rows are arranged at intervals; heat conduction plates are placed between every two adjacent layers of the battery packs in the battery rows; the heat conduction plates extend around the battery packs in a convex manner; heating pieces are adhered to the front ends of the heat conduction plates; and fins are formed in transverse air flow channels in the tail parts of the heat conduction plates. By adopting the power battery thermal control box body, the problem that effective heat management cannot be implemented to every single battery as the heat exchange area is too small is solved; meanwhile, a power battery temperature field is uniformly distributed, and the temperature can be rapidly adjusted; and moreover, due to the sealed design, the battery box body is high in security and high in energy utilization rate.