High-performance　hydrogel　electrolyte　is　a　candidate　material　for　flexible　all-solid-state　supercapacitor.　However,　there　are　some　challenges　limiting　the　application　of　hydrogel　electrolyte　in　supercapacitors,　such　as　poor　interfacial　contact　between　gel　electrolyte　and　solid　electrode,　freezing　at　low　temperature,　and　environmental　instability.　Herein,　an　adhesive,　anti-freezing　and　environment　stable　poly(vinyl　alcohol)/poly(acrylamide-co-[2-(methacryloyloxy)　ethyl]　dimethyl-(3-sulfo-propyl)　ammonium　hydroxide)/CaCl2　(PVA/P(AM-co-SBMA)/CaCl2,　PASC)　organohydrogel　electrolyte　was　successfully　fabricated.　Non-zwitterionic　components　(PVA,　AM)　were　introduced　into　the　organohydrogel　network　to　construct　the　double　network　zwitterionic　organohydrogel.　Meanwhile,　appropriate　amount　of　CaCl2　was　introduced　into　the　gel　network　to　promote　the　formation　of　P(AM-co-SBMA)　chain　entanglement　structure,　which　could　significantly　dissipate　energy　to　toughen　the　organohydrogel　and　achieve　favorable　mechanical　properties　(tensile　strength　216　±　15　kPa,　Young＇s　modulus　311　±　15　kPa).　In　addition,　abundant　zwitterionic　polymers　and　hydroxyl　groups　endowed　the　organohydrogel　with　favorable　adhesion.　An　excellent　water　retention　capacity　and　satisfactory　low-temperature　tolerance　based　on　the　synergistic　effect　of　zwitterionic　polymers,　glycerol　and　CaCl2　was　endowed　to　PVA/P(AM-co-SBMA)/CaCl2　organohydrogel.　Based　on　the　above　favorable　performance,　a　flexible　all-solid-state　supercapacitor　was　constructed　by　sandwiching　organohydrogel　electrolyte　between　two　CNT　film　electrodes.　Impressively,　the　flexible　all-solid-state　supercapacitor　delivered　a　wide　potential　window　(0–2.1　V),　and　exhibited　a　long　cycling　life　(7000　cycles)　and　a　high-capacity　retention　(82.4%).　Moreover,　based　on　the　tight　contact　between　electrolyte　and　electrode,　the　device　showed　superior　electrochemical　stability　even　under　harsh　deformations　such　as　hammering　and　bending.　It　was　believed　that　this　work　provided　a　significant　method　for　developing　high-performance　organohydrogel　electrolytes　for　flexible　all-solid-state　supercapacitor.　©　2022　Elsevier　Ltd