A　single-phase　homogeneous　(La0.2Y0.2Nd0.2Gd0.2Sr0.2)CrO3　powder　with　high　configurational　entropy　was　synthesized　by　using　the　sol-gel　method.　The　powder　was　obtained　under　mild　experimental　conditions,　the　crystal　grains　were　fine　and　uniform,　and　the　elements　were　evenly　dispersed.　We　sintered　the　powders　into　monolithic　porous　green　body　by　adding　cellulose　nanocrystals,　which　had　good　electrical　conductivity.　Their　electrical　conductivity　at　room　temperature　was　approximately　6.6743　Ω·cm　when　the　porosity　was　38.90%.　The　experimental　results　showed　that　as　the　porosity　increased,　the　resistivity　increased　and　the　thermal　conductivity　decreased　accordingly.　This　trend　occurred　because　of　an　increase　in　the　porosity　and　a　decrease　in　the　connection　of　the　particles;　thus,　the　electron　hole　carriers　were　subjected　to　a　greater　resistance　when　passing　through　the　junction.　The　combination　of　these　properties　indicates　that　the　porous　high-entropy　(La0.2Y0.2Nd0.2Gd0.2Sr0.2)CrO3　ceramic　possesses　promise　in　the　field　of　high-temperature　electrochemical　materials.　©　2021　Elsevier　B.V.