Catalyst for preparing divalent alcohol by hydrogenating dibasic acid ester and preparation method and application thereof

The invention relates to a catalyst for preparing divalent alcohol by hydrogenating dibasic acid ester and a preparation method and application thereof, which belong to the technical field of catalytic hydrogenation. The catalyst takes metal copper as a main active component, one or a few of rare earth elements or transitional metal elements as a cocatalyst, and SiO2 as a carrier, wherein the content of the metal copper is 5 to 50 percent of the weight of the catalyst, the content of the cocatalyst is 0.1 to 10 percent of the weight of the catalyst, and the balance of the carrier. The catalyst can be used for the reaction for preparing the divalent alcohol by hydrogenating the dibasic acid ester, such as the preparation of ethylene glycol by using diethyl oxalate; and the catalyst has better activity, selectivity and stability, high time space yield of products, simple flow and easiness for continuous operation.