This　paper　characterizes　the　morphological　and　elemental　compositions　of　individual　particles　in　seven　micro-environments　of　Xi＇an.　Atmospheric　particulate　matter　samples　were　collected　at　one　suburban　site　(Duling　Park　(DL)),　three　urban　sites　(roadside　site　(RS),　clear　days　(CD),　dusty　days　(DD))　and　three　indoor　sites　(hot　pot　(HP),　barbecue　(BBQ),　hospital　(HO))　during　March-April　in　2017.　A　total　of　469　particles　were　analysed　by　a　scanning　electron　microscopy　with　an　energy　dispersive　X-ray　spectroscopy.　Seven　types　of　particles　were　observed,　including　sulphate　particles,　iron　oxide　particles,　dust　mineral　particles,　soot,　organic　aerosols,　silicon-aluminium　(Si-Al)-rich　fly　ash　and　biological　particles.　Soot　accounted　for　22%　in　BBQ,　indicating　an　effect　of　BBQ　coal　burning.　Sulphate　particles　were　found　in　high　abundance　(14-15%)　in　HP　and　HO　samples,　consistent　with　the　occurrence　of　secondary　chemical　reactions.　Organic　aerosols　accounted　for　13%　in　HO,　20%　in　HP　and　BBQ　samples　due　to　cooking　of　food　and　human　factors.　Comparison　of　samples　in　indoor　and　outdoor　environments　showed　that　the　external　transmission　of　dust　mineral　particles　and　Fe　oxide　particles　played　a　key　role　in　indoor　levels.　The　microscopic　analysis　also　demonstrated　that　the　particles　in　Xi＇an　were　highly　distributed　with　fine　particles　(less　than　3　mu　m)　and　that　the　morphology　of　fine　particles　tended　to　be　spherical.