The use range of mortar spraying machine is very wide, mainly used for soft foundation reinforcement grouting, backfilling grouting, anchor rod support, etc. in tunnel, subway, and mining construction. It can also be used for transportation of building masonry mortar or gray mortar, large-scale spraying of geotechnical engineering grouting, and various pressure grouting in reservoirs, hydropower stations, ports and docks. Adopting cam transmission and piston structure for automatic pressure control, with reverse pump function, the problem of pipeline blockage is minimized. The hydraulic oil cooling adopts a forced air cooling heat dissipation system, without the need to connect to a water source, making it convenient and simple to use. The electrical part adopts PLc control, which has the best handling characteristics and saves labor. Equipped with an automatic centralized lubrication system to ensure the service life of rotating parts.