The ball milling process and the CuWO4-WO3 precursors were investigated,and a new highly concentrated wet ball-milled process (HWM) was designed.W-20 wt％ Cu composite powders with excellent sintering property were synthesized by highly concentrated wet ballmilled process and co-reduction.The powders were characterized by scanning electron microscopy (SEM),X-ray diffraction (XRD),field electron transmission electron microscopy (FESEM) and laser-diffraction diameter tester.The results indicate that particle size of WO3-CuO powder mixtures decreases to 390 nm rapidly with the milling time increasing to 5 h.The CuWO4 precursors promote the microstructural homogeneity of W and Cu.W-Cu composite powders have a highly dispersed and well sintering property.The particle size of W-Cu powders milled by HWM for 5 h is about 680 nm.High-resolution transmission electron microscopy (HRTEM) result suggests that W phase and Cu phase are mixed at nanometer scale.The above W-Cu composite powders reach the relative density of about 99.3％.