A　new　type　of　WC-based　coating　with　high　oxidation-　and　wear-resistance　at　elevated　temperature　was　fabricated　by　thermal　spraying　the　pre-treated　WC-Co　powder　doped　with　WB.　Addition　of　WB　led　to　in　situ　formation　of　WCoB,　which　acted　as　a　substitute　for　Co　in　the　powders　and　the　resultant　coatings.　It　was　shown　by　thermal　analysis　that　WCoB　has　obviously　higher　oxidation　resistance　at　high　temperatures　than　that　of　WC　and　Co.　Thus,　the　oxidation　of　the　WC-WCoB　coating　was　mainly　initiated　from　WC,　rather　than　from　Co　in　the　conventional　WC-Co　coatings.　Most　of　WCoB　was　preserved　in　the　coating　after　high-temperature　wear　tests.　Particularly,　with　an　addition　of　40　wt.%　WB,　the　wear　rates　of　the　WC-Co　coating　were　dramatically　decreased　by　90%　and　77%　at　the　room　and　elevated　temperatures,　respectively.