Because there is still a long way to go before kerf-loss silicon can be reused for solar-grade feedstock, which requires that the purity of silicon reaches at least 6 N, it is meaningful and feasible to apply the kerf-loss silicon to the raw material for anode material used in lithium-ion batteries. In this work, the kerf-loss silicon encapsulated with Zn/N co-doped carbon mesoporous core-shell structure had been rationally designed and constructed. PDDA acts as a "glue" to bond phenolic resin and Si. It was believed that the introduction of PDDA can solve the problem that the heterogeneous nucleation of phenolic resin can not be realized on the surface of kerf-loss silicon, which may be caused by the larger scale and irregular morphology of kerf-loss silicon. The co-doping of Zn and N improved the conductivity of the wSi@NC/Zn-2 electrode and inhibited the occurrence of side-reaction. At the same time, the carbon shell could alleviate the huge volume expansion and accelerate the transportation of Li-ion. Thanks to the co-doping of Zn and N and the porous carbon shell, the obtained wSi@NC/Zn-2 electrode delivered a reversible capacity of 1392 mAh/g after 300 cycles at a current density of 0.2 A/g. When tested at a heavier current at 0.5 A/g, the wSi@NC/Zn-2 electrode still exhibited a reversible specific capacity of 1082 mAh/g. At the same time, the wSi@NC/Zn-2 electrode also showed a pretty good rate of performance. When tested at 0.5, 1, 2, 3, 4, 5 and 0.5 A/g, reversible capacities of ~1704, 1345, 1157, 1038, 884, 752 and 1638 mAh/g were obtained. Once the current density returned back to the initial value, namely 0.5 A/g, the reversible capacity could reach 96% of initial discharge capacity, showing good capacity recovery capability.