In　order　to　solve　the　problems　of　low　hardness　and　poor　wear　resistance　of　titanium　alloy,　laser　cladding　technology　was　used　to　prepare　NiCrBSi　coatings　with　different　amounts　of　B4C　on　the　surface　of　Ti-6Al-4V　alloy.　The　effects　of　B4C　content　on　the　microstructure　evolution,　hardness,　fracture　toughness,　and　wear　resistance　of　NiCrBSi　coatings　were　investigated.　The　results　showed　that　with　an　increase　of　B4C　addition,　the　size　and　number　of　ceramic　phases　TiB2,　TiC,　and　CrB　in　the　coating　increased,　and　the　ceramic　phases　were　dispersed　in　the　coating.　The　average　microhardness　of　the　coating　with　9　wt.%　B4C　addition　was　the　highest,　reaching　1250.3　HV0.2,　which　is　15%　higher　than　that　of　the　coating　without　B4C　addition.　After　adding　B4C,　the　fracture　toughness　of　the　coating　increased.　When　the　addition　of　B4C　was　3　wt.%,　the　fracture　toughness　of　the　coating　was　the　highest,　reaching　1.42　MPa　m(1/2),　which　is　178.4%　higher　than　that　of　the　coating　without　B4C.　With　the　increase　of　the　addition　of　B4C,　the　wear　loss　of　the　coating　decreased　and　the　wear　resistance　increased.