In 2011， Shandong Provincial Bureau of Geology and Mineral Resources implemented the first domestic hot dry rock survey and evaluation project in Lijin County， Shandong Province， where rotary drilling was adopted， but the drilling efficiency was low and energy consumption was high. To improve drilling efficiency， shortening drilling cycle， reduce production cost in hard rock drilling at high temperature， in both the southeast coast deep scientific drilling hot dry rock geothermal well HDR-1 of China Geological Survey （depth of 4000.86m， hole bottom temperature 109℃） implemented in Zhangzhou， Fujian Province in 2015， and the hot dry rock scientific exploration well GR1 （well depth of 3705m， hole bottom temperature 236 ℃） implemented in Qinghai province in 2017， the compound drilling technology of “rotary table and mud motor” was tried， and the “rotary+turbodrill” compound coring drilling technology was tested over the coring section for the first time at high temperature with good results obtained. Some comments and suggestions are put forward on the future research direction， which provides valuable experience on high-temperature drilling for the in-depth study of the PDM drill and turbodrill， and also provides new technical support for hot dry rock scientific drilling and deep geothermal resource exploration in China.