Abstract: Ni-rich ternary cathode materials (LiNixCoyMnzO2, x≥0.8) have become a hot spot for research in the field of lithium-ion batteries due to the advantages of high energy density, low cost, and green environmental protection. However, with the increase of Ni content, the materials are facing a lot of challenges in terms of structural stability, cycling, and safety performance. This paper reviews the current challenges faced by nickel-rich ternary cathode materials, including lithium-nickel mixing and irreversible phase transition, surface residual alkali and interfacial side reactions, stress-strain and microcracking, and transition metal dissolution, and proposes a variety of modification strategies for the above challenges, including ion doping, surface interface modification, and structural design, which are aimed at enhancing the surface-interface and structural stability of the materials, thus improving the electrochemical performance of the cathode materials. This paper provides a comprehensive summary and scientific analysis for the research of Ni-rich ternary cathode materials, and provides a reference for the design, development and practical application of Ni-rich ternary cathode materials with high specific energy, long cycle and high safety.