Cascade heat supply system coupled with hot dry rock geothermal energy temperature rise

The utility model discloses a cascade heat supply system coupling hot dry rock geothermal energy to raise temperature, which comprises a heat supply steam extraction unit, a water supply source, an absorption heat pump unit, a ground heat exchanger and a first heat exchanger, the heat supply steam extraction unit is provided with an air outlet, and the absorption heat pump unit is provided with a first channel, a second channel and a third channel. The first channel is communicated with the air outlet, the water supply source is communicated with the second channel, the third channel is suitable for introducing a driving heat source, the driving heat source in the third channel can exchange heat with air in the first channel, and the air in the first channel can exchange heat with water in the second channel; the fifth channel is communicated with the second channel, the sixth channel is communicated with the fourth channel, and water in the fifth channel can exchange heat with the circulating medium in the f