China is rich in geothermal energy， so it is necessary to develop geothermal energy to alleviate China’s increasing dependence on foreign energy； in addition， the prospect of geothermal energy development and utilization is broad. The fracturing monitoring technology with the inclinometer can monitor the development of fracture morphology， particularly the fracture extension direction， and has been widely used in oil and gas development. It plays an important role in guiding the well pattern layout， fracturing process and construction scale. The X1 well in Qinghai Gonghe Basin is difficult to monitor because of its tight and hard lithology， many construction uncertainties and small flow rate； meanwhile， X1 is the first one of geothermal wells to be fractured in China. It is the first time worldwide that inclinometer fracturing monitoring technology is used to monitor the process of HDR geothermal well fracturing treatment. The successful implementation of X1 well fracturing monitoring has explored and enriched the geothermal well fracturing monitoring methods， broadened the application scope of inclinometer monitoring. The important fracture parameters of X1 were obtained by monitoring， which provides basic data for well pattern layout in this area and an important reference example for monitoring and operation with the inclinometer.