The　amount　of　Zhundong　coal　is　huge.　The　high　content　of　alkali　and　alkaline　earth　metal　(AAEM)　in　Zhundong　coal　results　in　more　fine　particulate　matter　during　its　combustion.　In　this　paper,　the　emission　of　fine　particulates　from　AAEM　rich　coal　in　Zhundong　and　AAEM　poor　coal　in　Zhunnan　was　investigated　in　a　drop　tube　furnace.　The　size　distribution,　concentration　and　composition　of　the　particulates　were　measured.　The　distribution　of　Na,　K,　Mg,　Ca,　Fe　in　fine　particulates　and　their　effects　on　the　generation　of　fine　particulates　were　obtained.　The　results　show　that　the　fine　particulates　from　AAEM　rich　coal　combustion　mainly　consist　of　sulfates　and　the　oxides　of　AAEM.　The　amount　of　fine　particulates　from　burning　AAEM　poor　coal　decreased　significantly.　Co-firing　of　AAEM　rich　coal　with　AAEM　poor　coal　had　an　obviously　synergistic　effect　of　reducing　the　fine　particulates　emission.　Ca　and　Fe　played　an　important　role　in　PM10reduction　during　blended　coal　combustion.　©　2017,　Editorial　Office　of　Journal　of　China　Coal　Society.　All　right　reserved.