By air drilling technology, drilling efficiency can be greatly improved and the drilling construction cost can be reduced at the same time. At present, air drilling technology is continuously improved and widely used in drilling construction. The paper briefly introduces the application situation of air drilling technology, describes the main equipments and technological process and emphasizes the advantages and disadvantages of air drilling. The application effects are obvious in some parts of the eastern Inner Mongolia Autonomous Region, where there are hard basalt rocks and severe lost circulation.