Abstract: When selecting the design scheme of filling station in small metal mines，mining meth⁃ ods，properties of tailings，cementitious materials，performance of dehydration equipment，etc. should be considered. At the same time，multi scheme technical and economic comparison should be carried out to fi⁃ nally determine the design scheme suitable for enterprises. By introducing the whole process of the design of a filling station in a small metal mine，this paper points out the key problems that should be paid atten⁃ tion to in the design process from the aspects of the determination experiment of physical and chemical properties of tailings，the hydraulic experiment of filling slurry pipeline transportation，the analysis of the experimental results of filling slurry strength ratio，the economic comparison of different filling process schemes，and the verification of key equipment selection results. At present，the filling station has been successfully commissioned and has been in trial production for nearly half a year，and the underground goaf has been successfully filled with nearly 80 000 m³. From the design example，it can be concluded that when determining the process scheme of the filling system，one-stage dehydration scheme should be adopt⁃ ed as far as possible，and the system is simple and convenient for operation and management；For filling mines with ultra-fine tailings and low tailings yield，it can be tried to use unpowered deep cone thickener for dewatering and filling，which has high underflow concentration and pressure raking risk for long-term storage. The design scheme has certain reference significance for the design and production of fine-grained and small-scale filling mines.

Key words: filling station, dewatering equipment, unpowered deep cone thickener, fine grained tailings