Conductive　hydrogels　have　shown　a　great　potential　in　the　field　of　flexible　electronics.　However,　it　is　difficult　to　combine　high　strength　and　high　toughness　in　conductive　hydrogels　prepared　by　conventional　methods,　which　limits　their　applications　in　various　fields.　In　this　work,　we　pioneered　a　facile　and　cost-effective　strategy　to　prepare　soy　protein　isolate/poly(vinyl　alcohol)　(SPI/PVA)　conductive　hydrogels　with　high　strength,　toughness,　low-temperature　resistance,　and　recyclability　by　introducing　all　the　salts　into　the　prescuor　solution　directly.　To　solve　the　problem　of　unable　to　directly　introducing　high　concentration　Na3Cit　into　the　soy　protein　isolate/PVA　solution,　MgCl2　was　used　to　alleviate　the　strong　salting-out　effect　of　Na3Cit.　Thus　the　stable　SPI/PVA/EG/MgCl2/Na3Cit　complex　solution　was　obtained　and　the　SPI/PVA/EG/MgCl2/Na3Cit　(SPEMS)　organohydrogel　was　prepared　by　the　freezing/thawing　process.　The　optimum　tensile　strength　of　the　SPEMS　organohydrogel　was　1.1±0.07　MPa,　and　the　elongation　at　break　was　701.3±23.67　%,　respectively.　Meanwhile,　the　ionic　conductivity　of　the　organohydrogel　was　as　high　as　1.7±0.01　S/m.　Finally,　the　EG/H2O　binary　solvent　system　endowed　the　organohydrogel　with　excellent　low-temperature　resistance　(freezing　point　of　−19.4　°C).　The　strain　sensors　assembled　with　SPEMS　organohydrogels　were　characterized　by　high　sensitivity　(GF　=　3.2,　strain　range　from　20　%–500　%)　and　long-term　stability.　The　flexible　all-solid-state　supercapacitor　assembled　with　SPEMS　organohydrogel　as　the　electrolyte　and　activated　carbon　as　the　electrodes　has　a　high　area　specific　capacitance　(113.76　mF/cm2)　and　good　cycling　stability　(capacitance　retention　of　81.62　%　after　1,000　charging　and　discharging　cycles)　at　room　temperature.　©　2024