Main　observation　and　conclusion　A　series　of　catalysts　were　prepared　for　sugar　alcohols　production　to　overcome　the　deficiencies　of　the　previous　reported　catalysts,　such　as　low　yield　of　sugar　alcohols,　single　function,　instability,　and　controversial　role　of　active　sites.　The　role　of　each　metal　and　their　synergistic-cooperation　was　discussed　in　detail　with　a　combination　of　conditional　experiments　and　characterizations.　The　results　indicated　that　bifunctional　Ni6.66Fe1Al1.55　catalyst　has　unique　structure　with　superparamagnetism　and　excellent　activity.　The　(111)　and　(200)　planes　of　metallic　Ni　are　the　hydrogenation　active　phases　and　preferentially　exposed　on　Ni-Al-O-x　spinel.　The　desired　arabitol　or　mannitol　was　obtained　by　tuning　the　ratio　of　Bronsted　and　Lewis　acid　sites.　The　recycling　tests　indicated　that　the　unique　structure　of　the　prepared　Ni-based　catalyst　can　suppress　leaching　and　poisoning,　which　has　high　textural　stability　and　activity.