Abstract: In view of the problems of complex old goaf filling system,unstable slurry ratio,difficult control of slurry ratio and others in the 15307 working face of Huayu Wujiagou Coal Industry,an optimized design of a joint efficient filling and grouting system scheme for underground wells is proposed.This scheme includes establishing grouting stations on the ground,constructing grouting boreholes and water intaking boreholes in underground wells,detailed implementation of grouting pipeline laying and closed retaining wall construction in the old goaf is conducted to provide infra-structure guarantee for grouting operations;Through intelligent proportioning and efficient filling and pulping technology,the problems of unstable slurry ratio,difficult control of slurry ratio and so on are solved,filling and grouting with one click start stop control is achieved,significantly im-proving the quality and efficiency of filling and grouting.The optimized system not only ensures construction safety,but also achieves significant economic benefits,providing technical support for the safe production of mining and excavation working faces and technical reference for the integra-tion of mine old goaf filling governance,which has promotional value.