Heat　treatments　of　the　HVOF　sprayed　chromium　oxide　coating　were　performed　in　chamber　electric　furnace.　Effects　of　heat　treatment　temperature　on　dry　tribological　properties　and　wear　mechanism　of　the　coating　were　studied　by　microhardness　testing　machine,　scanning　electron　microcopy　(SEM),　energy-dispersive　spectroscopy　(EDS)　and　friction　wear　testing　machine.　Results　indicate　that　comprehensive　wear　&　friction　resistance　of　the　coating　after　heat　treatment　at　500°C　were　the　best　under　the　experimental　condition　in　this　paper.　Heat　treatment　doesn＇t　alter　wear　mechanism　of　the　coating.　The　main　wear　mechanisms　of　the　coating　were　abrasive　wear　and　slight　spalling　at　10　N　load,　but　at　25　N　load,　spalling　was　the　main　wear　mechanism　and　abrasive　wear　also　exist.