In　this　paper,　shale　and　feldspar　were　regarded　as　matrix　materials　and　sillcon　carbide　was　added　as　foaming　agent.　After　a　quality　ratio　of　walnut　shell　was　mixed　with　as　pore-forming　agent,　porous　insulation　materialswere　made　through　high　temperature　foaming.　The　firing　curve　was　developed　by　studying　the　thermal　history.　XRD　and　micro-morphology　were　used　to　study　the　effects　of　the　amount　of　walnut　shell　on　the　density,　thermal　conductivity　and　mechanical　properties　of　the　products.　The　results　show　that　when　the　amount　of　walnut　shell　was　10%,　the　sample　density　was　180　kg/m(3),　and　the　flexural　strength　and　compressive　strength　could　reach　1.031　MPa　and　0.862　MPa　respectively.　Meanwhile,　the　thermal　conductivity　was　0.076　W/(m.K)　and　the　water　absorption　could　achieve　1.5%.　It　is　concluded　that　adding　walnut　shell　has　no　effect　on　the　crystallization　of　the　sample,　but　the　walnut　shell　couldreplace　a　part　of　raw　materials,　resulting　in　the　increase　of　density　and　strength.　At　the　same　time,　the　appearance　of　miscellaneous　stomata　could　be　attributed　to　the　addition　of　walnut　shell,　and　the　number　of　open　pores　increased,　leading　to　the　increase　of　water　absorption　and　thermal　conductivity.