Summary In this study, nickel tellurium oxide (Ni3TeO6) was composited with carbon nanotubes (CNTs) through the high‐energy ball‐milling method and proposed as a high‐energy conversion‐type anode for sodium‐ion batteries (SIBs) for the first time. Upon mechanical milling, the Ni3TeO6 nanoparticles were uniformly encapsulated and wedged within the CNTs matrix, which produced a nano/micro hybrid structure. The interconnected CNT network in the composite provided conductive paths for rapid electron transport while effectively suppressing the local stress caused by large volume changes of Ni3TeO6 during the sodiation–desodiation process. The Ni3TeO6@CNTs exhibited a high Na+‐ion storage capacity of 495 mA h g−1, good cycling stability at 200 mA g−1, and high‐rate performance up to 2000 mA g−1. Ni3TeO6@CNTs composite is first reported with good rate performance and electronic conductivity as anode materials for sodium‐ion batteries.