Si3N4　porous　ceramics　possess　light　weight,　high　specific　mechanical　strength,　excellent　specific　surface　area,　low　thermal　conductivity　and　low　dielectric　constant,　making　them　to　be　promising　candidates　as　high-temperature　structural　components,　adsorbent,　filters,　catalyst　supports,　wave　transparent　materials,　bio-scaffolds　and　so　on.　The　comprehensive　performance　of　Si3N4　porous　ceramics　is　closely　dependent　on　the　processing.　Herein,　based　on　the　design　of　raw　materials,　the　fabrication　of　Si3N4　porous　ceramics　will　be　reviewed.　Furthermore,　the　general　pore-forming　techniques　for　Si3N4　porous　ceramics　will　be　analyzed,　thus　providing　guidelines　for　the　microstructure　design　and　performance　regulation　of　Si3N4　porous　ceramics.　©　2023　Chinese　Journal　of　General　Practitioners.　All　rights　reserved.