TiB2/Al2O3　composite　coatings　were　deposited　by　axial　plasma　spraying　(Mettch　Axial-III):　One　of　feedstock　powders　was　conventional　micrometer　powder　derived　from　self-propagating　high　temperature　synthesis　process,　and　the　other　was　fabricated　by　spray-drying　TiB2/Al2O3　composite　powder　doped　with　10%　mass　fraction　nanosize　Al2O3　powder.　Microstructure　and　wear　resistance　of　two　type　coatings　were　compared,　and　effects　of　nanoscale　powder　on　the　coatings　were　investigated.　Scanning　electron　microscope　and　X-ray　diffraction　analysis　were　used　to　analyze　the　sprayed　coatings,　and　disc　abrasive　wear　apparatus　was　employed　to　test　wear　resistance　of　the　coatings.　Results　show　that　density　and　wear　resistance　of　sprayed　coating　from　spray-drying　powder　are　better　than　that　from　conventional　powder,　TiO2　content　is　also　less　than　that　in　the　coating　from　conventional　powder,　and　superficial　Rockwell　Hardnesses　of　two　coatings　are　about　the　same.