To　understand　the　structure-reactivity　relationship　of　Ni/La2O3,　and　eventually　get　more　applicable　catalysts　for　DRM,　glycine　nitrate　combustion　(GNC),　precipitation　(PP)　and　thermal　decomposition　(TD)　methods　have　been　used　to　prepare　La2O3　supports.　Although　all　the　supports　possess　a　hexagonal　La2O3　phase,　their　bulk　and　surface　properties　are　significantly　changed.　By　using　them　as　supports,　the　interactions　between　NiO/Ni　and　La2O3　are　varied,　thus　achieving　Ni/La2O3　catalysts　with　different　activity,　stability　and　anti-coking　ability,　which　follow　the　order　of　5Ni/La2O3-GNC＞5Ni/La2O3-PP＞5Ni/La2O3-TD.　On　La2O3　having　a　higher　surface　area,　a　catalyst　with　a　higher　active　metallic　Ni　surface　area　can　be　achieved.　Therefore,　the　interfaces　between　Ni　and　La2O2CO3　can　be　enlarged,　which　effectively　facilitates　the　reaction　between　carbon　deposits　and　the　La2O2CO3　formed　during　the　DRM,　thus　preventing　the　accumulation　of　both　and　keeping　the　catalyst　surface　clean,　active　and　stable.　In　addition,　the　amount　of　surface　alkaline　and　active　oxygen　sites　of　the　reduced　catalysts　obey　the　order　of　5Ni/La2O3-GNC＞5Ni/La2O3-PP＞5Ni/La2O3-TD,　which　is　well　consistent　with　the　reaction　performance.　Therefore,　these　two　factors　are　also　believed　to　be　critical　to　decide　the　reaction　performance.　It　is　concluded　that　Ni/La2O3　catalysts　with　high　activity,　stability　and　potent　anti-coking　ability　for　DRM　can　be　achieved　by　preparing　catalysts　with　high　Ni　dispersion.