Air reverse circulation sampling drilling technology is a relatively mature and advanced process technology in foreign countries， which has the advantages of high construction efficiency， low production cost and good exploration effect. However， domestic use is relatively small. In view of the current domestic demand for air reverse circulation sampling drilling rigs， when analyzing the mobile safety coring efficiency and drilling safety of complex formation drilling rigs， a new full hydraulic air reverse circulation drilling rig using electronically controlled load feedback system—YGL-220RC reverse circulation sampling drilling rig was developed. The on-site use results show that the electronic control and manual cooperate with each other， so that it has the advantages of strong adaptability， energy saving and environmental protection， smooth crawler walking， simple operating system， stable full hydraulic system， less auxiliary time， convenient and fast loading and unloading drilling tools， multi-angle construction， and more humanized details. It solves the problems that arise at the construction site and during the construction process well. Compared with the high cost and technical restrictions of foreign countries， YGL-220RC reverse circulation sampling drilling rig well solves the needs of sampling drilling efficiency， energy saving and environmental protection in today''s drilling market.