The phosphate tailings filling system is an equipment used for tailings treatment in phosphate mining, usually including filling pumps, mixers, conveying pipelines, control valves, etc. The phosphate tailings filling system requires mixing the tailings with appropriate filling materials to produce a paste suitable for transportation, and using a filling pump to transport the paste to the designated location. In order to ensure the requirements of filling effect and safety, the phosphate tailings filling system needs to be equipped with appropriate equipment and materials, and used and maintained correctly. At the same time, it is necessary to consider the treatment and discharge of phosphate tailings, as well as environmental protection requirements.