Abstract: In order to study the performance of cemented filling with classified tailings in Miaoling Gold Mine,the mineral composition,chemical composition,and grain gradation distribution were analyzed and the properties of the slump,subsidence performance,uniaxial compressive strength,press,and filter and L-shaped pipeline were tested in this paper.The experimental results show that the slurry of classified tailings has better uniaxial compressive strength,flow characteristics,and pumpability when the ratio of ash to sand is 1∶4 and the concentration of slurry is 70 %-74 % for the classified tailings in Miaoling Gold Mine,indicating that the tailings can be used for filling in mines.