Energy-saving ground source heat pump ground heat exchanger

The utility model discloses a ground heat exchanger of an energy-saving ground source heat pump, which comprises a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe, a water outlet pipe, a water outlet pipe and a water return pipe, and is characterized in that the lower end of the water inlet pipe is connected with one end of a U-shaped connecting pipe; the sealing connecting sleeves are respectively mounted at the joints of the U-shaped connecting pipe and the water inlet pipe and the water return pipe; the heat preservation plate is connected to the side, close to the water inlet pipe, of the water return pipe in a sleeving mode; the support is installed between the water inlet pipe and the water return pipe, and fixing sleeves are fixed to the left end and the right end of the support; and the rotating handle is arranged on the outer side of the fixing sleeve, a threaded rod is installed at the joint of the rotating handle and the fixing sleeve, and a clamping plate is rotation