Silicon-based　anodes　heavily　depend　on　the　binder　to　preserve　the　unbroken　electrode　structure.　In　the　present　work,　natural　flaxseed　gum　(FG)　is　used　as　a　binder　of　silicon　nanoparticles　(SiNPs)　anode　for　the　first　time.　Owing　to　a　large　number　of　polar　groups　and　a　rich　branched　structure,　this　material　not　only　anchors　tightly　to　the　surface　of　SiNPs　through　bonding　interactions　but　also　formed　a　hydrogen　bonding　network　structure　among　molecules.　As　a　result,　the　FG　binder　can　endow　the　silicon　electrode　with　stable　interfacial　adhesion　and　outstanding　mechanical　properties.　In　addition,　FG　with　a　high　viscosity　facilitates　the　homogeneous　dispersion　of　the　electrode　components.　When　FG　is　used　as　a　binder,　the　cycling　performance　of　the　Si　anode　is　greatly　improved.　After　one　hundred　cycles　at　an　applied　current　density　of　1　A　g−1,　the　electrode　continues　to　display　remarkable　electrochemical　properties　with　a　significant　cyclic　capacity　(2213 mA h　g−1)　and　initial　Coulombic　efficiency　(ICE)　of　89.7%.　©　2024　Wiley-VCH　GmbH.