PVC-U plastic pipe has the character of corrosion resistance, noscale, light weight and long service life. With the application of it in the exploration of shallow geothermal energy and water supply pipe well engineering, the corrosion and break, scale in metal well pipe, and difficulties in recharging by groundwater heat pump can be solved with maintenance cost reduced and service life prolonged. According to the demonstration engineering practice of shallow geothermal energy exploration and water supply pipe well in Zhengzhou City, the paper detailed the result of research on completion technology of PVC-U plastic pipe well, existing problems and the solution.