▎ 摘　　要

NOVELTY - Boron nitride composite carrier loaded copper catalyst, comprises copper species and boron nitride composite carrier, where the boron nitride composite carrier is prepared by carrying out physical and/or chemical action of boron nitride and secondary carrier, the copper species accounts for 1-20 wt.% of the weight of the catalyst, and the boron nitride composite carrier accounts for 80-99 wt.% of the weight of the catalyst. USE - The boron nitride composite carrier loaded copper catalyst is useful in the heterogeneous hydrogenation reaction of dimethyl oxalate (claimed). ADVANTAGE - The boron nitride composite carrier loaded copper catalyst has mild reaction conditions, excellent catalytic reaction performance, simple preparation process, and low production cost. In heterogeneous hydrogenation reaction of dimethyl oxalate, compared with the existing copper-based catalysts, the catalyst ensures high yield product distribution control of ethylene glycol or methyl glycolate by adjusting the type and/or ratio of the boron nitride composite carrier. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: Preparing boron nitride composite carrier loaded copper catalyst, comprising loading copper on the carrier by impregnation method, precipitation method or ammonia distillation method; and Use method of the boron nitride composite carrier loaded copper catalyst, comprising loading the catalyst into constant temperature section of the fixed-bed reactor, introducing hydrogen gas under the pressure of 2-3 MPa to carry out temperature programming, performing reduction at 220-350 ℃ for 2-6 hours, cooling to 180-220 ℃, introducing dimethyl oxalate to react, and controlling the reaction pressure to 2-3 MPa, and the ratio between hydrogen and ester is 60-150.