A multifunctional hydrogel with outstanding mechanical properties and excellent ionic conductivity holds immense potential for applications in various fields, such as healthcare monitoring, and various devices, such as wearable devices and flexible electronics. However, developing hydrogels that combine high mechanical strength with efficient electrical conductivity remains a considerable challenge. Herein, an ion-conductive hydrogel with excellent mechanical properties and ionic conductivity is successfully created. This hydrogel integrates sensing capabilities, freeze tolerance, and long-term solvent retention through a synergistic combination of lignin-containing cellulose nanofibers (LCNF), polyvinyl alcohol chains, ethylene glycol, and aluminum chloride. The resulting hydrogel demonstrates exceptional mechanical performance in terms of various factors, including tensile strength (1.28 MPa), strain capacity (794.94 %), toughness (6.32 MJ/m