Abstract: According to the technical level and characteristics of present double liquid grouting pump in coal mines, the structural transformation and upgrading is carried out, a new pneumatic double liquid grouting pump station is developed. Its composition system and institutional characteristics are introduced, at the same time, the system working principles are analyzed, including pneumatic system, hydraulic system, cleaning system. It is mainly used in sealing the hole for gas drainage in coal mine. By the application in underground coal mine, it is safe and reliable, quality assurance, high efficiency, energy conservation and environmental protection.