The　microstructures,　mechanical　properties　and　tribological　behaviors　in　a　wide　temperature　range　of　high　velocity　oxygen　fuel　sprayed　CoMoCrSi　coatings　before　and　after　800　°C-annealed　treatment　were　comparatively　investigated.　Particularly,　the　annealed　CoMoCrSi　coatings　registered　well　crystallization,　improved　microstructures　and　enhanced　properties　compared　to　the　as-sprayed　coatings.　Specially,　the　surface　microhardness　increased　by　13.3%,　and　the　adhesive　strength　increased　by　12.5%　after　the　annealed　treatment.　Moreover,　a　compact　oxides　layer　comprising　Cr2O3,　Co3O4,　MoO3　and　CoMoO4　formed　on　the　annealed　coating　surface,　which　could　be　account　for　the　increased　microhardness　and　excellent　tribological　behaviors　of　the　annealed　coatings.　The　annealed　coatings　registered　lower　friction　coefficients　and　wear　rates　than　the　as-sprayed　coatings　in　a　wide　temperature　range.　Consequently,　the　800　°C-annealed　treatment　could　significantly　improve　the　microstructures　and　properties　of　the　HVOF-sprayed　CoMoCrSi　coatings.　Moreover,　the　annealed　CoMoCrSi　coatings　could　be　a　well　candidate　for　the　abrasion-resistant　material　in　a　wide　temperature　range.　©　2022　Elsevier　B.V.