In the hot dry rock exploration project in Tianzhen， Datong， a large amount of high temperature and high pressure gas-water mixture blew out of the well when drilling reached 1622m， which is extremely rare in the drilling of hot dry rock. In response to this major discovery of deep geothermal resources in the central and eastern region， the Shanxi Geological Prospecting Bureau organized experts to analyze and study the wellhead gushing situation. Through repeated practice， the square box was used to open and close the gate valve to achieve diversion with comprehensive treatment of “drilling-grouting-cooling-depressurizing-killing well-installing Christmas tree”. As a result， the geothermal well was successfully protected with power generation test completed. This paper analyzes the generation of the blowing well， and summarizes systematically the entire treatment process， providing valuable experience and technical support for future exploration and drilling for similar geothermal resources.