This　work　mainly　focuses　on　the　mineralogical　study　of　particulate　matter(PM10)　in　Beijing.　Samples　were　collected　on　polycarbonate　filter　from　April,　2002　to　March,　2003　in　Beijing　urban　area.　Scanning　electronic　microscopy　coupled　with　energy　dispersive　X-ray(SEM/EDX)　was　used　to　investigate　individual　mineral　particles　in　Beijing　PM10.　1454　individual　mineral　particulates　from　48　samples　were　analysed　by　SEM/EDX.　The　results　revealed　that　mineral　particulates　were　complex　and　heterogeneous.　38　kinds　of　minerals　in　PM,　were　identified.　The　clay　minerals,　of　annual　average　percentage　of　30.1%,　were　the　main　composition　among　the　identified　minerals,　and　illite/smectite　was　the　main　composition　in　clay　minerals,　reaching　up　to　35%.　Annual　average　percentage　of　quartz,　calcite,　compound　particulates,　carbonates　were　13.5%,　10.9%,　11.95%,　10.31%,　respectively.　Annual　average　percentage　less　than　10%　were　gypsum,　feldspar,　dolomite,　and　so　on.　Fluorite,　apatite,　halite,　barite　and　chloridize　zinc　(ZnCl2)　were　firstly　identified　in　Beijing　PM10.　Sulfurization　was　found　on　surface　of　mineral　particles,　suggested　extensive　atmospheric　reaction　in　air　during　summer.