Abstract: The Application of air down-hole hammer in drilling can achieve high efficiency drilling and good hole quality in medium hard to hard rock. It can ensure the high drilling speed and accuracy of hole in the rescue drilling combined with the Blackstar EM-MWD. This article introduces the principle of electromagnetic wave of wireless MWD, through the bottom-hole-assembly applied damping measures combined with air down-hole hammer, it is used for drilling. From the field trial, it has properly vibration damping measures for bottom-hole-assembly, fast drilling speed, high measurement speed and precision.