According　to　the　forming　process　and　structural　characteristics　of　foamed　ceramics,　the　method　of　selecting　voxels　of　X-ray　computed　tomography　(X-CT)　based　on　the　structure　details　of　scanning　electron　microscope　(SEM)　analysis　and　selecting　gray　threshold　based　on　the　formation　and　characteristics　of　pores　was　determined.　Through　tomographic　images,　X-CT　three-dimensional　reconstruction　and　visual　analysis,　the　fact　that　the　foamed　ceramic　consists　of　large　pores　and　small　pores　on　the　pore　wall　was　obtained.　The　foam　ceramic　pores　are　basically　in　a　connected　state,　and　the　connection　is　caused　by　small　holes　in　the　cell　wall.　Furthermore,　the　maximum　connected　pore　diameter　is　not　more　than　60　μm,　and　the　minimum　connected　pore　diameter　is　about　14　μm　are　demonstrated.　It　shows　that　the　pore　diameter　of　the　foamed　ceramic　macropore　is　between　0.5　and　1.0　mm,　the　maximum　pore　diameter　not　more　than　2　mm,　and　the　porosity　is　85.97%.　The　thickness　of　the　wall　is　concentrated　between　20　and　60　μm.　The　research　shows　that　X-CT　has　obvious　advantages　in　studying　the　spatial　structure　relationship　(i.e.　connectivity)　of　foam　ceramic　pores　and　the　statistical　information　(pore　size　distribution,　wall　thickness　distribution,　etc.)　of　large-size　structure　of　foam　materials.　©　2019,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.