The　experiment　of　biomass　and　coal　char　blended　fuels　under　different　blending　ratios　was　carried　out　on　a　high　temperature　thermogravimetric　analyzer.　The　influence　of　the　blending　ratio　of　different　biomass　on　the　combustion　characteristics　of　coal　char　blended　fuels　was　studied.　The　ignition　temperature,　the　burning　temperature　and　the　comprehensive　burning　characteristic　index　of　blended　fuels　were　analyzed.　The　kinetic　data　of　activation　energy　and　pre　exponential　factor　of　biomass　and　coal　char　mixture　under　different　blending　ratios　were　obtained　by　dynamic　analysis　of　the　experimental　data.　＇the　results　show　that　with　the　increasing　proportion　of　biomass　mixing,　ignition　temperature　and　burning　temperature　of　the　mixed　fuel　are　decreased,　maximum　combustion　rate,　average　burning　rate　and　the　comprehensive　combustion　characteristic　index　of　the　mixed　fuel　are　increasing,　the　activation　energy　of　low　temperature　section　increases　and　activation　energy　of　the　high　temperature　section　decreases　continuously.　Compared　with　the　three　biomasses,　bamboo　has　the　greatest　influence　on　the　activation　energy　of　blended　fuels.