Abstract: Lithium slag is a new type of large and difficult to treat solid waste that has emerged with the booming development of the lithium battery industry. Due to its complex composition, there are differences in the characteristics of different lithium slag. The article tested lithium pyroxene and lithium mica slag by characterization means such as XRF, XRD, physical property test, SEM test, and pore structure test, and studied the physical and chemical properties of lithium pyroxene and lithium mica slag. Based on experimental research and conclusions from previous studies, this article provides a comprehensive analysis of lithium ore characteristics, lithium extraction processes, lithium slag properties, and lithium slag storage conditions. After treatment, lithium slag exhibits pozzolanic activity and can be utilized as a building material in applications such as concrete and cement products, cement, wall materials, and sintered materials. The article elucidates the similarities and differences between lithium spodumene and lithium mica slag in their building material applications. It also proposes reasonable suggestions for future lithium slag resource reuse pathways based on the distinct characteristics of different slags, providing reference for the sustainable development of the lithium battery industry.