Binders are required to dissipate huge mechanical stress and enhance the lithium-ion diffusion kinetics of silicon anodes during cycling. Herein, a stress-distribution binder with high ionic conductivity (GG-g-PAM) is constructed by grating polyacrylamide (PAM) onto ion-conductive guar gum (GG) backbone. The mechanical stress distribution toward the grafted PAM chain enables the effective stress dissipation of the GG-g-PAM binder, and thus maintains a stable electrode-electrolyte interface during cycling. The stress dissipation ability of the GG-g-PAM binder is confirmed by PeakForce atomic force microscopy experiments and finite element simulations. In addition, lithium complexation sites provided by oxygen heteroatoms in GG of the GG-g-PAM binder construct the Li-ion pathways for facilitating Li ionic diffusion in the Si anodes. The good cyclabilities of Ah-level pouch cells based on Si nanoparticle anodes strongly confirm GG-g-PAM as a desirable binder for practical Si anodes.