Nanocrystalline　Ni(nc-Ni)　coating　was　synthesized　by　pulse　electrodeposition.　The　microstructures　of　the　coatings　were　analyzed.　The　effects　of　pulse　electric　current　density　and　testing　load　on　the　tribological　properties　of　nanocrystalline　nickel　coating　were　investigated.　The　results　show　that　the　grain　sizes　in　the　coatings　prepared　by　pulse　electro-deposition　are　uniformity.　The　microhardness　and　wear-resistance　of　nanocrystalline　nickel　coating　increase　because　of　decreasing　the　grains　sizes　along　with　the　increasing　of　pulse　electrical　current　density,　and　the　wear　mechanism　of　the　nanocrystalline　nickel　coating　was　changed　from　adhesive　wear　to　abrasive　wear.