Temperature　is　an　important　index　to　evaluate　the　microwave　heating　characteristics　and　affection　of　Formation　microwave　heating　treatment.　Experiments　on　microwave　heating　of　coal　powder　were　conducted　to　investigate　the　temperature　rising　characteristics　of　coal　powder.　The　results　indicated　when　the　microwave　heating　power　ranged　from　1　kW　to　5　kW,　the　temperature　rising　rate　of　the　coal　sample　with　grain　size　0.18　mm–0.25　mm　was　larger　than　that　with　grain　size　1.00　mm–2.00　mm.　However,　this　relation　was　the　opposite　when　the　microwave　power　was　6　kW.　The　temperature　rising　rate　increased　with　the　increased　moisture　and　pyrite　content　of　the　coal　sample,　while　it　decreased　with　the　increased　calcium　carbonate,　silicon　dioxide,　and　potassium　chloride　of　coal　samples.　Moreover,　the　correlation　between　oxygen　concentration　and　the　temperature　rising　was　not　obvious　in　this　study.　Finally,　empirical　equations　between　various　factors　and　the　heating　temperature　are　given.　©　2021　Elsevier　Ltd