The　effect　of　biomass/coal　blend　ratio　on　ash　fusion　characteristics　was　investigated　through　ash　fusion　test.　To　obtain　a　high-precision　and　repeatable　deformation　temperature,　the　reading　method　based　on　fusion　test　and　kinetics　analysis　of　fusion　process　was　proposed.　The　results　showed　that　with　the　increase　of　biomass　blending　ratio,　initial　deformation　temperature　decreased　due　to　the　decrease　of　alumina　and　the　increase　of　potassium,　and　the　formation　of　low　melting　point　orthoclase　and　diopside.　Kinetics　analysis　indicated　that　the　decrease　of　initial　deformation　temperature　with　increased　biomass　blending　ratio　was　essentially　caused　by　the　decrease　of　activation　energy.　Moreover,　the　average　height　and　area　shrinkage,　40.8%　and　51.8%　respectively,　were　recommended　as　the　reading　reference　for　the　acquirement　of　deformation　temperature.　©　2020,　Science　Press.　All　right　reserved.