A negative electrode material includes silicon-based particles. The silicon-based particles include a silicon-containing substrate and a polymer layer. The polymer layer exists on at least a part of a surface of the silicon-containing substrate. The polymer layer includes carbon nanotubes and alkali metal ions. The alkali metal ions include Li+, Na+, K+, or any combination thereof. Based on a total weight of the silicon-based particles, a content of the alkali metal ions is approximately 50˜5,000 ppm. A lithium-ion battery prepared by using the negative active material achieves a lower resistance, higher first-time efficiency, higher cycle performance, and higher rate performance.