Abstract: The online monitoring system of coal mine borehole group is designed, and the drilling group data processing software based on full data analysis method is developed. The on-line monitoring system of the mine drilling group uses the trajectory while drilling instrument to measure the drilling track, uses the water pressure sensor to measure the depth of the drilling hole, realizes the real-time uploading of the drilling field borehole measurement data with the help of the mine industrial ring network, and uses the ground drilling group data processing software to quickly locate the hole group track and final hole drop point of the drilling field, and accurately determine the drilling blind area and the position relationship between the drilling hole and the coal seam. The test shows that the online monitoring system of borehole group in coal mine is stable, the data processing is simple and effective, and the three-dimensional display of drilling group track and coal seam position is intuitive and clear.