Firstly,　the　hollow　sphere　green　bodies　were　prepared　using　fly　ash　and　mineral　powder　as　raw　materials,　the　fly　ash　contents　were　12.5%　(in　mass),　25.0%,　37.5%,　50.0%,　respectively.　Then,　the　green　bodies　were　sintered　to　prepare　the　porous　ceramics.　With　the　help　of　scanning　electron　microscope,　X-ray　diffraction,　X　ray　fluorescence　and　electron　probe　micro　analysis,　the　microstructures　and　composition　of　the　samples　were　analyzed.　The　results　show　that　the　main　phase　of　the　precipitates　porous　ceramics　is　wollastonite,　and　the　apparent　density　is　increased　with　the　mass　ratio　of　fly　ash.　The　ceramics　with　25.0%　fly　ash　and　sintered　at　1000℃　has　an　apparent　density　of　1.94　g/cm3and　a　compressive　strength　of　163.20　MPa.　©　2015,　Editorial　Department　of　Journal　of　the　Chinese　Ceramic　Society.　All　right　reserved.