Abstract: Aiming at the problem that the fouling of the equipment at the Fowa pump station in Xinjing Coal Mine caused serious gas extraction inefficiencies, a comprehensive study on the scale control technology of the pumping station was carried out. A treatment plan combining descaling and scale inhibition was proposed, a fully automatic online descaling device and scale inhibition device with on-line water quality monitoring and automatic drug delivery function was developed, and the descaling and anti-scaling effects were tested in laboratory and verified by field industrial test. The results show that the scale treatment plan of “pre-scale removal and post-scale inhibition” is feasible, the scale inside the equipment is completely removed, and the water quality of the circulating water is significantly improved after scale inhibition. This scheme realizes the scale-free operation of gas extraction pumping stations.