A　high-performance　ion　gel　composed　of　poly(ethyl　acrylate-co-acrylic　acid-co-sodium　acrylate)　(P(EA-co-AA-co-AANa))　with　a　high　ionic　liquid　content　was　successfully　fabricated　through　a　simple　solution-casting　method.　It　exhibits　excellent　mechanical　strength　owing　to　the　various　non-covalent　interactions　between　the　polymer　chains　and　the　entropic　elasticity　of　the　highly　entangled　polymer　networks.　By　adjusting　the　polymer　composition,　the　ion　gel　film　can　achieve　a　tensile　strain　exceeding　6000%　or　a　tensile　stress　exceeding　2.5　MPa.　This　ion　gel　also　has　the　advantages　of　excellent　thermal　stability,　good　transparency,　high　ionic　conductivity,　and　wide　electrochemical　window.　More　importantly,　the　polymer　P(EA-co-AA-co-AANa)　is　easy　to　synthesize,　the　monomer　is　cheap,　and　the　gel　preparation　is　simple,　making　it　possible　to　realize　large-scale　production　for　broad　applications　in　the　fields　of　motion　sensors,　gel　electrolytes,　and　flexible　displays.　©　2022　The　Royal　Society　of　Chemistry.