The　Cu/SiO2　catalyst　has　been　widely　used　in　dimethyl　oxalate　(DMO)　hydrogenation　due　to　its　low　cost　and　high　efficiency.　However,　the　reaction　temperature　of　DMO　hydrogenation　is　higher　than　the　Huttig　temperature　of　Cu,　and　the　smaller　Cu　particles　are　easier　to　agglomerate.　Therefore,　there　is　much　interest　in　constructing　a　catalyst　with　a　small　particle　size　and　strong　stability.　In　the　present　work,　the　effect　of　introducing　EDTA　on　Cu/SiO2　catalysts　is　systematically　investigated.　It　not　only　was　beneficial　to　form　smaller　copper　nanoparticles　(CuNPs)　but　also　to　enhance　the　stability　of　Cu　species　by　introducing　a　suitable　amount　of　EDTA.　Furthermore,　the　surface　Cu　species　were　more　evenly　dispersed,　and　the　number　of　active　sites　was　increased　with　the　introduction　of　EDTA;　subsequently,　the　synergistic　effect　between　Cu+　and　Cu-0　was　enhanced.　The　best　performance　of　0.08E-Cu/SiO2　had　been　achieved　in　the　DMO　hydrogenation　to　ethylene　glycol　(EG),　and　the　DMO　conversion　and　EG　selectivity　reached　99.9%　and　97.7%,　respectively.　Above　all,　the　0.08E-Cu/SiO2　catalyst　exhibited　a　high　level　of　stability　during　the　1200　h　life　test　at　180　degrees　C.