Abstract: We researched the virtual instrument technology and developed a set of virtual instrument system for the coal mine full-hydraulic drilling rig in order to obtain the parameters of the rig in the course of work timely, accurately and comprehensively, so that it could ensure the safety and validity of the drilling construction and improve the efficiency of drilling construction. This set of virtual instrument system can monitor various parameters of drilling rig. All the information will be displayed on the LCD screen in the forms of software dials, numbers and histograms and it provides fault early warning function of the key parts of the drilling rig.