Aiming at the problems of large quantity and slow construction speed in the construction of water exploration and discharge holes of heading face in the coal mine roadway, a split crawler drilling rig with narrow body, flexible movement and twin boom was developed. It was used in the heading face of E2308 belt gateway in Gaohe Coal Mine. The results show that the drilling rig has reasonable structure design, safety and reliability, short operation assistance time and high drilling efficiency, which provides reference and guidance for similar construction of water exploration and discharge holes of heading face in other coal mine.