Aluminum-based　composite　abradable　seal　coatings　are　pivotal　to　improving　the　efficiency　of　aero　engines　or　gas　turbines.　However,　the　adhesive　transfer　frequently　occurs　between　metallic　blade　tips　and　aluminum-based　composite　coatings,　resulting　in　engine　vibration　and　even　jam.　Many　past　studies　had　tried　to　solve　this　problem　by　reducing　coating　hardness,　improving　lubrication,　or　strengthening　blade　tips,　but　all　had　failed.　In　this　paper,　we　proposed　a　novel　epoxy-based　composite　abradable　seal　coating,　eliminating　adhesive　transfer　by　changing　metal-to-metal　scraping　pair　to　metal-to-polymer　scraping　pair.　The　coating　was　developed　via　a　hierarchical　structure　design.　Large　spherical　pores　were　uniformly　distributed　in　the　continuous　epoxy　matrix　with　fine　graphite　dispersion.　By　adding　20　vol.%　graphite　and　50　vol.%　hollow　microspheres,　a　self-lubricating　epoxy-based　coating　of　0.26　friction　coefficient　with　thermal　conductivity　of　0.28　W/(m·K),　coating　HR15Y　hardness　at　54.8,　and　bonding　strength　at　18.7　MPa　can　be　reached.　When　the　metallic　blades　scrape　the　epoxy-based　composite　coating,　no　adhesive　transfer　occurs.　Besides,　a　smooth　scraped　surface　is　formed　by　pseudoplastic　deformation.　This　epoxy-based　composite　abradable　seal　coating　opens　a　new　way　to　improve　the　efficiency　and　reliable　operations　of　air　engine　compressors.　©　2021