The understanding of magmatic- hydrothermal evolution during lithium mineralization remains unclear. Zircon, a prevalent accessory mineral in granites and pegmatites, has the potential to provide insights into the magmatic evolutionary process through its trace element composition. In this research paper, we studied the trace element compositions of zircons from granites and pegmatites in the Keeryin area of the Songpan- Ganzi orogenic belt. The morphological and textural features of the zircons indicate that zircons from granodiorite and granite are magmatic in origin, whereas those from pegmatite have been influenced to varying degrees by hydrothermal fluid. Our findings from the trace element analysis reveal a gradual increase in the contents of rare metal elements (Li, Sn, Nb, Ta, and Hf) and U in zircon as the Zr/Hf ratio decreases. This trend is observed from Taiyanghe granodiorite to Keeryin two- mica granite to spodumene- free pegmatite to spodumene- bearing pegmatite. In addition, zircons from Taiyanghe granodiorite and Keeryin two- mica granite exhibit low Fe contents, whereas zircons from spodumene- free pegmatite and spodumene- bearing pegmatite show significantly higher Fe contents. A significant positive correlation exists between Fe and the concentrations of rare metals, indicating a stronger hydrothermal influence leads to a higher rare metal content in zircon. The hydrothermal fluids have impacted the U- Pb system of zircons in pegmatites, resulting in the obtained ages being unreliable. However, the U- Pb age of columbite- tantalite (210 Ma) in pegmatite is more reliable. Based on the trace element composition of zircons, we propose that the Taiyanghe granodiorite is not related to the formation of spodumene pegmatites, whereas the two- mica granite has a genetic relationship with spodumene pegmatites. However, the two- mica granite is not the direct parental rock of the mineralized pegmatites. The Lizircon/Liwhole- rock ratios of the two- mica granite and spodumene- free pegmatite are close to or even exceed 1, indicating that they are not in equilibrium. This suggests that a Li- rich melt was once formed during the magmatic evolution. Furthermore, this Li- rich melt was not a result of melt immiscibility, but rather fractionation. The Li- rich melt could have separated from the magmatic system through a regional detachment fault and subsequently evolved to form spodumene- bearing pegmatite, while the residual magma crystallized to form two- mica granite and spodumene- free pegmatite. Therefore, trace elements in zircon can effectively trace the magmatic- hydrothermal evolution during lithium mineralization. Furthermore, the trace element compositions of detrital zircon can also indicate the presence of lithium- rich magmas, providing information about their formation age and source. This approach may serve as a new method for tracing lithium mineralization.