Abstract: Since the 21st century, the development and utilization of ground source heat pump in shallow geothermal energy is carried out in China successively. But it is still in its infancy, and there is a general lack of scientific design and planning, the problem of heat accumulation occurred in the process of application of ground source heat pump system, seriously affecting the sustainable development and utilization of shallow geothermal energy. In order to guarantee shallow geothermal energy sustainable development and utilization and avoid the problem of heat accumulation during the running period of ground-source heat pump in the downtown of Danyang, a three-dimensional coupled numerical model of groundwater unsteady seepage and heat transfer was established and applied to the demonstration project of the buried pipe heat pump system in Danyang, Jiangsu Province. The model was based on the principle of groundwater seepage and heat transport, combined with future ground-source heat pump system operating conditions, forecasting the thermal equilibrium development trend of underground temperature field. Three schemes were designed on this basis. Scheme 1 is to adjust heat transfer hole spacing. By simulation and calculation, we changed the minimum heat transfer 5 m hole spacing to 18, 23,17, 20, 20 m inⅠ-Ⅴarea respectively, and results showed that due to the increase of heat transfer hole spacing through mining buried pipe shallow geothermal energy for ten years, the rise in formation temperature decreased. Scheme 2 is to keep the heat exchange hole spacing constant, and heating spring and autumn living water. The total area of heating domestic water in study area was 173.23 km2, single hole heat exchange was calculated with 5% heat loss and heating water from 15 to 50 ℃. By the simulation and calculation, keeping 5 m transfer hole spacing, the heating water amount reach 1 447 826.19 m3/d in spring and autumn with the development and utilization of shallow geothermal energy. Mining 10 years, due to increasing heating water in spring and autumn, there is little increase in formation temperature during the year. The temperature of soil in winter, autumn and spring increases slowly, the problem of heat accumulation is alleviated. Scheme 3 is to keep the heat exchange hole spacing constant and add the cooling tower auxiliary heat exchange hole for summer heat discharge. The cooling tower is in accordance with the number of heat exchange holes in buried pipes and keeping 5 m transfer hole spacing, running 10 hours a day, let water through cooling towers of different cooling temperatures. Mining 10 years, the mixed heat transfer system with cooling tower and buried pipe can eliminate the heat accumulation caused by separate buried pipe system, ensure a good temperature recovery. Due to the limit of ground source heat pump engineering site, Scheme 1 can't be used, heating water in spring and autumn or adding cooling tower auxiliary heat exchange hole for summer heat discharge can be adopted in the actual project. The three-dimensional coupled numerical model of groundwater unsteady seepage and heat pump is an effective way to optimize and determine the sustainable development and utilization plan of ground source heat pump for shallow geothermal energy.