Abstract: In view of the problems existing in the underground production of gently inclined thin veins in Sanxin Gold-Copper Mine,based on the occurrence conditions of No.VII 2 ore body in the Jiguanzui mining area,the mining schemes are selected.Through the analysis,it is determined that the two-step mining followed by the filling mining method is used to comprehensively mine the gently inclined thin ore body,and the different stope layout forms and mining sequences are comprehensively compared and analyzed.Finally,it is determined that the pseudo-inclined stope layout with stope perpendicular to the ore body trend is used as the mining method of the underground gently inclined thin ore vein of Sanxin Gold-Copper Mine.The scheme can realize the technical and economic indicators of a stope production capacity of about 370 t/d,a mining loss rate of about 3 %,and ore dilution rate of about 5.4 %,and safe,efficient,and economic mining,which provides favorable technical support for the mining of deep gently inclined thin veins of Sanxin Gold-Copper Mine.