Ground source heat pump with anti-freezing device

The utility model relates to the technical field of ground source heat pumps, in particular to a ground source heat pump with an anti-freezing device, which comprises a base and a box body, a first polyurethane insulation board is mounted at the top of the base through screws, and the box body is mounted at the top of the first polyurethane insulation board through screws. Third polyurethane heat preservation plates arranged in a matched mode are installed on the five surfaces of the interior of the box body through screws, the bottoms of the four third polyurethane heat preservation plates make contact with the top of the first polyurethane heat preservation plate, and a plurality of communicated ventilation openings are formed in the surface of the box body and the surfaces of the third polyurethane heat preservation plates. The first polyurethane heat preservation plate, the second polyurethane heat preservation plate and the third polyurethane heat preservation plate are arranged and used for protecting t