In Summary, CNT supported "nano-skeleton" Si-SiOx@C anodes were fabricated by an in-situ molecular crosslinking reaction between GA and APTMS with the presence of polydopamine-wrapped silicon nanoparticles and CNTs. The CNT nanoskeleton can improve electrical contact between particles and increase conductive pathways, as confirmed by CAFM, as well as promoting the formation of a denser and homogenous SEI layer. Curly CNTs can also work as buffer regions and improve the mechanical property (Young's modulus), better withstanding the volume expansion of Si. Therefore, the repeated destruction of the SEI layer during continuous cycling can be avoided. The stable and dense SEI layers are formed on the surface of Si-SiOx@C-1.25, observed by in-operando XRD, Raman, optical microscope and ex-situ XPS. The Si-SiOx@C-1.25 anode delivered a high capacity (918 mAh•g -1 at 200 mA•g -1 ) and high-capacity retention (74% after 300 cycles) with reduced volume expansion (71.4%).