Abstract: For working condition of medium and small rotary drilling rigs in coal mines, the traditional storage inclinometer with wired communication method has problems of high cable cost, difficult interface technology and inconvenient operation. This paper proposes a wireless communication strategy for synchronous machine and inclinometer that enables accurate transmission of measurement data. At the same time, a miniature probe (outer diameter/20 mm, length/692 mm) was designed, and the screen tube can be freely lowered without measuring the drill. The field test shows that the device is convenient, reliable and accurate.