Extraction of high-quality geothermal water with geothermal wells is a prerequisite for the extraction-reinjection geothermal heating system， and it is the most sensitive factor affecting the economic benefits of the entire hydrothermal geothermal energy project. The key drilling technology is of great significance to the well completion quality， and plays a decisive role in the development of the geothermal industry of Hancheng. In view of the geological characteristics of geothermal resources in the Hancheng area and the difficulties encountered in the development process， theoretical analysis and experimental research was conducted to investigate the key technical issues in geothermal drilling in the Hancheng with the five key technical aspects presented of local geothermal drilling heating extraction in Hancheng： anti-collapse and high-efficiency drilling， geothermal well sealing， acidization stimulation for productivity and reinjection improvement， in-situ extraction and reinjection optimization layout， cascade heat exchange and recharge. Through theoretical analysis of the technical problems encountered in the production process， the key technologies to solve the problems are proposed， and the five key aspects are explained in detail. They are of important scientific and engineering significance to the development and utilization of mid-deep geothermal resources in the Hancheng area， and can provide reference to other regions.