A large number of primary melt inclusions and crystal-rich fluid inclusions are developed in two-mica granites and pegmatites in Jiajika deposit, western Sichuan. In this study, the authors identified the mineral types of glass from melt inclusions of quartz in two-mica granite and daughter minerals from fluid inclusions of beryl and spodumene in pegmatites by means of laser Raman and scanning electron microscopy. According to the experimental results, Jiajika glass from melt inclusions of quartz in two-mica granite consists mainly of apatite+muscovite, muscovite+albite and muscovite+graphite. Crystals from fluid inclusions of beryl comprise mainly corundum, alumina-rich ferrosilicate+corundum+spodumene, spodumene+quartz+lithium chlorite. Crystals from fluid inclusions of spodumene are composed mainly of apatite, cassiterite, magnetite, quartz+albite+lithium chlorite, fluorite, calcium-magnesium-rich silicate+alumina-rich ferrosilicate+ferrosilicate+quartz. From early granite to pegmatite, the melts and fluids in the metallogenic melt and fluid in general showed high values of Na, Si, Al and F, and decrease of Fe, Mg and Ca. The ore-forming fluid of early granitic pegmatite magma to beryl and spodumene subminerals showed inheritance and some differences, with the existence of local pegmatite magma, magma immiscibility and non-uniformity. The increase of volatilization content of F, P and CO₂ in pegmatite played an important role in the mineralization of rare metals.