Abstract: Ternary lithium-ion batteries (LIBs), widely used in new energy vehicles and electronic products, are known for their high energy density, wide operating temperature range, and excellent cycling performance. With the rapid development of the battery industry, the recycling of spent ternary LIBs has become a hot topic because of their economic value and environmental concerns. To date, a considerable amount of literature has reported on the recycling of spent ternary LIBs designed to provide an efficient, economical, and environmentally friendly method for battery recycling. This article examines the latest developments in various technologies for recycling spent ternary LIBs in both research and practical production, including pretreatment, pyrometallurgy, hydrometallurgy, pyro-hydrometallurgy, and direct regeneration. Suggestions for addressing challenges based on the benefits and disadvantages of each method are made. Finally, through a comparison of the feasibility and economic benefits of various technologies, the challenges faced during battery recycling are summarized, and future development directions are proposed.