The author makes a detail description of the structure features and working principle of Model MERCURY-14 full hydraulic drilling jumbo as well as its operation in Jiaojia gold mine. The practice proved that this drilling jumbo was stable in performance, quick in drilling, compact in strture, flexible in travelling,safe and reliable in operation, and has the multipurpose functions. It can drill the blastholes in any direction and install the rock bolts. Under the conditions of both complicated geology and jumbo not to be full uses,50m/jumbo-shift and 1. 8 m/min (average rilling footage)were reached. Therefore,it can be considered that this jumbo was drilling equipment with high drilling efficiency,more functions, simple operation and good economic result.