Traditional　ionic　conductive　hydrogel　was　prepared　by　chemically　crosslinking　the　polymer　chains　to　form　network.　However,　the　chemically　crosslinked　ionic　conductive　hydrogel　usually　showed　limited　elongation　at　break　and　high　hysteresis　during　stretching　process.　Here,　a　simple　strategy　of　synthesizing　fully　physically　crosslinked　ionic　conductive　supramolecular　hydrogel　without　chemical　crosslinker　was　purposed.　Hydrophilic　salt　not　only　act　as　the　ion　supplier,　but　also　provide　the　spatial　confinement　effect　to　form　the　completely　physically　crosslinked　hydrogel.　Firstly,　CaCl2　was　used　as　the　representative　salt.　The　optimal　PVA/PAM/CaCl2　ionic　conductive　hydrogel　(PPC),　showed　excellent　tensile　performance　(2400.3　±　140.63　%),　anti-freezing　performance　(−28.8　°C),　high　conductivity　(4.8　±　0.01　S/m),　excellent　stability　at　room　temperature,　low　hysteresis,　and　high　transparency.　The　conductivity　of　PPC　showed　no　sensitivity　to　the　tensile　strain.　This　innovative　combination　enables　PPC　ionic　conductive　hydrogel　to　have　extraordinary　versatility.　The　flexible　all-solid-state　supercapacitor　assembled　with　PPC　ionic　conductive　hydrogel　as　the　electrolyte　has　a　high　area　specific　capacitance　(136.9　mF/cm2).　The　prepared　supercapacitor　can　maintain　good　stability　under　certain　tensile　deformation　(The　capacitance　retention　rate　was　87.7　%　when　stretched　at　200　%).　Moreover,　other　high　hydrophilic　salts　including　LiCl,　ZnCl2,　MgCl2　and　AlCl3　were　used　to　prepare　ionic　conductive　PVA/PAM　hydrogel　to　verify　the　universality　of　this　preparation　method.　©　2025　Elsevier　Ltd