For　the　sake　of　satisfying　diverse　service　conditions,　many　engineering　components　should　be　equipped　with　excellent　surface　properties,　such　as　high　hardness,　good　wear　resistance　and　corrosion　resistance.　Ordinary　metal　material　can　achieve　improved　surface　properties　by　cladding　the　alloy　powders　on　its　surface.　The　laser　cladded　coating　holds　favorable　adhesion　property,　excellent　microstructure,　small　heat　affec-ted　zone　and　outstanding　mechanical　properties.　The　commonly　used　laser　cladding　approaches　primarily　include　preset　powder　method　and　synchronous　powder　feeding.　The　common　cladding　materials　are　mainly　divided　into　three　categories,　namely　Fe,　Co　and　Ni　based.　The　Fe-based　coatings　feature　high　hardness　and　wear　resistance,　and　lower　price　as　well.　Nevertheless,　the　Fe-based　coating　is　prone　to　produce　defects　during　the　preparation　process,　resulting　in　the　decline　in　performance　and　reliability　of　the　coating.　Co-based　coatings　hold　excellent　high　temperature　resistance　and　corrosion　resistance,　yet　their　mechanical　properties　are　poor　and　the　price　is　extremely　high,　which　seriously　blocks　their　widespread　application　in　industry.　Ni-based　coatings　possess　excellent　wear　resistance,　good　toughness　and　wettability,　and　their　production　cost　is　relatively　economical,　which　show　broad　application　prospects.　In　recent　years,　great　efforts　have　been　put　into　the　research　of　Ni-based　coating.　At　present,　the　commonly　used　approach　for　strengthening　Ni　based　coatings　include　adjusting　the　process　parameters　of　laser　cladding　and　adding　hard　phases　or　appropriate　elements　to　the　Ni　based　coatings.　Many　researchers　have　concentrated　on　optimizing　the　composition　of　Ni-based　alloy　powders,　that　is,　adding　hard　phases　or　appropriate　elements　to　Ni　based　powders　to　enhance　the　properties　of　the　Ni　coating.　The　major　hard　phase　particles　added　to　Ni　based　coatings　include　WC,　NbC,　TiC,　TaC　and　VC.　Attempts　that　adding　certain　compound　elements　to　assist　the　generation　of　reinforcing　phases　in　laser　cladding　process　by　in-situ　reaction　have　been　made　by　researchers.　For　instance,　the　addition　of　pure　Nb　powder　(or　Nb2O5)　and　graphite　powder　contribute　to　generate　NbC,　the　addition　of　pure　Ti　powder　and　graphite　powder　is　conducive　for　the　formation　of　TiC　by　in-situ　reaction.　Some　researchers　have　tried　to　introduce　a　single　element　including　Nb,　Ti,　Al,　Ta　and　so　on,　in　order　to　improve　the　performance　of　the　coating.　Besides,　the　effect　of　rare　earth　elements　on　the　properties　of　coatings　have　been　explored　as　well.　Ni-based　alloy　coating　prepared　by　laser　cladding　are　endowed　with　high　bonding　strength,　excellent　corrosion　resistance　and　wear　resistance,　exhibiting　a　broad　application　prospect　in　engineering.　The　mechanical　properties　of　the　coatings　can　be　further　enhanced　by　improving　the　composition　of　the　alloy　powders.　In　this　article,　the　research　progress　of　hard　particle　reinforced　Ni-based　alloy　composite　coatings　is　reviewed.　The　problems　that　need　to　be　solved　for　the　hard　particle-reinforced　nickel-based　alloy　coatings　are　pointed　out,　and　the　prospects　of　the　research　are　also　discussed.　©　2019,　Materials　Review　Magazine.　All　right　reserved.