Air lift reverse circulation drilling technology is a relatively mature drilling method in drilling engineering. With the characteristics of high drilling efficiency， long bit life， and good well quality， it has been widely used and promoted. However， air-lift reverse circulation continuous coring technology is still in the stage of exploratory research. The predecessors have done theoretical exploration tests on this technology， but continuous coring tests have not been carried out， and the existing double-wall drilling tools are also unable to meet the requirements for sealing and durability due to the quality and diameter of the returning cores. Therefore， it is necessary to further carry out theoretical research， parameter calculation， optimization of drilling tool design， and continuous coring test to explore the development prospects of this technology. The tests have been done， and the results show that the design of the large diameter double wall drilling tool is reliable and durable， and it can successfully obtain cores continuously. The cores were timely taken， free of pollution， highly representative， and can truly reflect the stratum level， depth， and particle gradation without repeated erosion and repeated fragmentation.