Wood-based hydrogel with a unique aniso-tropic structure is an attractive soft material,but the pres-ence of rigid crystalline cellulose in natural wood makes the hydrogel less flexible.In this study,an all-wood hydrogel was constructed by cross-linking cellulose fibers,polyvi-nyl alcohol(PVA)chains,and lignin molecules through the Hofmeister effect.The all-wood hydrogel shows a high tensile strength of 36.5 MPa and a strain up to～438％in the longitu-dinal direction,which is much higher than its tensile strength(～2.6 MPa)and strain(～198％)in the radial direction,respec-tively.The high mechanical strength of all-wood hydrogels is mainly attributed to the strong hydrogen bonding,physi-cal entanglement,and van der Waals forces between lignin molecules,cellulose nanofibers,and PVA chains.Thanks to its excellent flexibility,good conductivity,and sensitivity,the all-wood hydrogel can accurately distinguish diverse macroscale or subtle human movements,including finger flexion,pulse,and swallowing behavior.In particular,when“An Qi”was called four times within 15 s,two varia-tions of the pronunciation could be identified.With recyclable,biodegradable,and adjustable mechanical properties,the all-wood hydrogel is a multifunctional soft material with promising applications,such as human motion monitoring,tissue engineering,and robotics materials.