Nanostructured manganese sulfide (MnS) has been verified to be effective to address the issues of MnS as next‐generation anode material in high energy lithium‐ion batteries (LIBs). The scale‐up fabrication, however, is still challenged by the multistep and rigid processes of synthesizing MnS nanoparticles. Herein, by using micro‐sized MnS as low‐cost MnS source, we present a facile, cost‐effective and scalable strategy to prepare a sub‐micrometer sized MnS@NSC composite, in which MnS nanoparticles are encapsulated into N,S‐codoped carbon matrix (NSC) deriving from polyacrylonitrile (PAN). The NSC matrix combined with homogeneously distributed MnS nanoparticles crushed from micro‐MnS provide fast access of lithium ion/electron and robust structure, leading to remarkable cycling stability (551.6 mAh g−1 at 0.5 A g−1 even after 400 cycles) and desirable rate capability (624 mAh g−1 at 0.1 A g−1 and around 300 mAh g−1 at 2 A g−1). Particularly, the assembled LIB full cell by coupling the anode with LiFePO4 (LFP) cathode presents an encouragingly cycling retention of 96 % after 100 cycles. This work provides a new possibility for design and industrial implementation of MnS as advanced anode materials for LIBs.