Microcrystalline　Ni　(MC-Ni),　ultrafine　grained　Ni　(UFG-Ni)　and　nanocrystalline　Ni　(NC-Ni)　with　mean　grain　sizes　of　2　μm,　120.7　nm　and　22.4　nm,　respectively　were　prepared　by　a　pulsed　electrodeposition　method.　The　room-temperature　one-way　tensile　tests　show　that　the　yield　strength　and　the　ultimate　tensile　strength　of　the　three　kinds　of　Ni　deposits　increase　with　decreasing　of　the　grain　size.　The　ductility　of　UFG-Ni　decreases　to　7.9%　compared　with　11.1%　of　the　MC-Ni,　while　the　UFG　Ni　shows　a　higher　uniform　elongation　than　MC-Ni.　However,　the　ductility　of　NC-Ni　is　only　4.1%.