n this study, S-doped Nb Se_2(NbS_(0.2)Se_(1.8)) powders were fabricated, and the corresponding Cu-based composites(Cu/Nb S_(0.2)Se_(1.8)) were obtained by powder metallurgy technique. The phase compositions, physical, and tribological properties of Cu-based composites were investigated systematically. The results show that Cu matrix reacts with Nb S_(0.2)Se_(1.8)to produce Cu_2 Se and Cu_(0.38) Nb S_(0.2)Se_(1.8)during sintering process, which influences the physical and tribological properties of Cu-based composites significantly. Specially, with Nb S_(0.2)Se_(1.8)content increasing, the density of Cu/Nb S_(0.2)Se_(1.8)composites decreases, and the hardness increases firstly and then decreases, while the electric resistivity increases slightly. In addition, the incorporation of Nb S_(0.2)Se_(1.8)enhances the tribological properties of Cu greatly, which is attributed to the lubricating effect of Cu_(0.38) Nb S_(0.2)Se_(1.8)and the reinforcement effect of Cu_2 Se. In particular, when the content of Nb S_(0.2)Se_(1.8)is 6 wt%, the Cu-based composite has the best tribological properties. S-doped Nb Se_2 (NbS_ (0.2) Se_ (1.8)) powders were fabricated, and the corresponding Cu-based composites (Cu / Nb S_ (0.2) Se_ (1.8) The results show that Cu matrix reacts with Nb S_ (0.2) Se_ (1.8) to produce Cu_2 Se and Cu_ (0.38) Nb S_ (0.2) Se_ (1.8) during sintering process, which influences the physical and tribological properties of Cu-based composites. Specially, with Nb S 0.2 Se 1.8 content increasing, the density of Cu / Nb S 0.2 Se 1.8, In addition, the incorporation of Nb S_ (0.2) Se_ (1.8) enhances the tribological properties of Cu greatly, which is attributed to the lubricating effect of Cu 0.38 Nb 2 S 0.2 Se 1.8 and the reinforcement effect Cu 2 Se. In particular, when t The content of Nb S_ (0.2) Se_ (1.8) is 6 wt%, the Cu-based composite has the best tribological properties.