It takes a lot of time to go out to change the bit in geological drilling construction， and there are certain safety risks， which greatly affects the drilling efficiency. Using the drilling technology of replacing the bit without lifting the rod can solve this problem well. Using the 95 specification wireline coring drill pipe as the platform， the basic structure of BH-75 drill pipe was used， and in view of the existing problems， the BH-95 specification drill pipe without lifting drill bit change was developed. At the same time， the BH-75 drill pipe was improved according to the specific structure of the 95 specification drill pipe， so as to improve the bearing capacity and convergence （delivery） stability of the drill pipe， and automatic sand removal mechanism was added. The technology was applied in the Taodi 1 well （geothermal well） in Yichun City， Jiangxi Province. The drill bit was changed without lifting drill at the hole depth of 680.65~704.25 meters. The success rate of drilling tool in place was 100%， the core recovery rate reached 99.4%， the core quality was good， and the tripping times were reduced to a minimum， effectively preventing the hole accidents caused by tripping. The drilling technology without lifting drill Bit Change provides timely optimization of drill bit usage plans， reducing energy consumption， effectively protecting hole wall safety， and reducing labor intensity for drilling in formations with strong abrasiveness， slipping， and frequent alternation of soft and hard in deep hole geological exploration.