In　the　present　study,　an　electrodeposited　nanocrystalline　(nc)　Ni　sample　with　high　strength　and　superior　ductility　relative　to　many　other　electrodeposited　nc-Ni　was　prepared.　The　superior　ductility　in　the　present　nc-Ni　sample　free　of　defects　was　ascribed　to　mixed　grains,　the　size　of　which　spanned　nano-and　sub-micro　scales　at　its　as-deposited　state　with　a　grain　size　distribution　ranged　from　5　to　120nm.　Obvious　dislocation　motion　happening　in　coarse-grained　polycrystalline　was　observed　in　large　grains　of　nc-Ni　matrix　resulting　in　a　remarkable　enhanced　ductility　without　a　decrease　in　the　strength.　The　present　nc-Ni　with　an　average　grain　size　of　27.2nm　prepared　by　direct　current　electrodeposition　shows　the　average　ultimate　tensile　strength　of　1200MPa　and　the　average　elongation　to　failure　of　10.4%.