3%Ru/CN was prepared via a simple ultrasound-assisted NaBH4 reduction method and used for hydrogenation of dimethyl terephthalate (DMT) to dimethyl 1,4-cyclohexanedicarboxylate (DMCD). The composition and surface properties of the support and catalyst were characterized by Raman spectrum, SEM, TEM, N2 adsorption-desorption isotherms, XRD, XPS, etc. The results showed that nitrogen was successfully incorporated into the carbon framework and the N-doped carbon material had a mesoporous structure. The effects of the amount of catalyst, reaction temperature, H2 pressure and reaction time on the hydrogenation of DMT to DMCD were investigated. Under optimal reaction conditions: m(DMT) is 1.00 g, m(catalyst) is 1.00 g, reaction temperature is 140 ℃,H2 pressure is 5.0 MPa and reaction time is 1h, the conversion of DMT is 100% and selectivity of DMCD is 99.3%. After recycled for 5 times, the catalytic performance of 3%Ru/CN-1000 catalyst did not decrease obviously, the conversion of DMT and the DMCD selectivity was 98.8% and 99.7%, respectively.