Inspired　by　the　layered　structure　of　dental　enamel　in　the　human　body,a　superhydrophobic　coating　with　an　elastic　gradient　was　developed　and　placed　on　the　inner　wall　of　a　gas　transmission　pipeline　to　reduce　erosion　and　corrosion.The　coating　comprises　a　hard　bionic　superhydrophobic　top　coating　and　a　hydrogel　layer　underneath　for　buffering　and　self-repair.To　improve　the　impact　resistance　of　the　top　coating,lay-ered　structures　with　different　viscoelasticities　were　constructed　by　controlling　the　content　of　lauric　acid(LA)@TiO2　particles　and　carbon　nanotubes(CNTs).The　amylose　hydrogel　underlayer　not　only　acts　as　a　shock　absorber　but　also　restores　potential　damage　in　the　top　layer,bringing　an　additional　benefit　to　the　corrosion　resistance　of　the　coating.Thanks　to　these　three　cooperative　approaches,the　coating　exhibits　excellent　mechanical　durability(800　cycles　with　600-mesh　sandpaper　under　a　49　kPa　load)and　corrosion　resistance(with　a　corrosion　potential　of-0.21　V).Moreover,it　maintains　its　superhydrophobicity　after　sanding,bending,soaking,and　scratching,demonstrating　its　potential　for　application　to　protect　transmis-sion　pipelines　from　erosion　and　corrosion.