Connecting structure and ground source heat pump heat exchanger

The utility model relates to the technical field of ground source heat pumps, in particular to a connecting structure and a ground source heat pump heat exchanger, which are characterized in that guide limiting plates and mounting rings are arranged on the surfaces of heat exchange tubes at two ends, and guide rings are sleeved on the surfaces of the guide limiting plates; a connecting column is arranged at the end of the middle heat exchange pipe, a tightening block is arranged on the surface of the middle heat exchange pipe, and sealing rings are arranged between the middle heat exchange pipe and the heat exchange pipes at the two ends. The surfaces of the heat exchange tubes at the two ends are sleeved with the connecting sleeves, guide-in grooves and tightening grooves are formed in the inner walls of the connecting sleeves, mounting grooves are formed in the inner walls of the connecting sleeves, and positioning grooves are formed in the ends of the connecting sleeves; the heat exchanger has the benefici