The drilling rescue in 2021 Hushan mine disaster is a typical case of successful borehole rescue in China. The hard formation and fracture easily lead to borehole deflection and sticking accidents. For this special condition， some drilling technologies such as DTH hammer air foam drilling and PDM deviation correction drilling was used to successfully complete the drilling rescue mission of the small diameter life support hole. This paper also summarizes the drilling rescue technologies for the life support hole， the drainage hole and the large diameter rescue hole， and puts forward some suggestions and problems on improving rescue work in the future.