The granite-type rare metal deposits are Jiangxi Province's most advantageous mineral resources. These deposits are mainly found in the province's western and northern regions, with Yichun 414 super-large Ta-Nb deposit serving as a representative. There have been no reports of rare metal deposits associated with the Yanshanian granite type in the widely dispersed granite of southern Jiangxi. We conducted a detailed examination of granite petrology, rock geochemistry, and isotope chronology in our focused study on the Hailuoling Nb-Ta deposit in Shicheng County, southern Jiangxi Province. The rock association in Hailuoling of medium grained porphyritic biotite monzonite granite and medium fine grained biotite monzonite granite has been determined, and the metallogenic specificity of the medium grained porphyritic biotite monzonite granite with albite superimposed muscovite, which is closely related to the niobium tantalite deposit, has been clarified. The mineralization of the Hailuoling Nb-Ta deposit was divided into two stages: the first stage was dominated by altered granite Ta-Nb ore, which was discovered in albitized muscovite medium-grained porphyritic biotite monzogranite, and the second stage was characterized by granite pegmatite type Li ore, which was discovered in mica spodumene pegmatite. The granite from the Hailuoling Nb-Ta deposit experienced a variety of alteration processes, including alkaline feldsparization and mica quartzitization. The granite of the Hailuoling Nb-Ta deposit is rich in silicon, alkali, aluminum, titanium, and magnesium. Furthermore, the albitized muscovite medium-grained porphyritic biotite monzogranite (a tantalum-rich granite) has a fluorine content ranging from 8330× 10^-6 to 13076×10^-6, with a mean of 10475×10^-6. There were very low Nb/Ta and Zr/Hf values, as well as very low whole rare earth concentration. This study found a substantial positive link between the degree of Ta mineralization enrichment and fluorine content, but a significant negative correlation between Nb/Ta and Zr/Hf values. Similarly, enrichment of Li mineralization is correlated with fluorine content but negatively correlated with overall rare earth content and K/Rb value. U-Pb dates of zircon in medium-fine-grained biotite monzogranite were estimated at 141.9±1.1 Ma, while early Cretaceous ages of mica spodumene pegmatite and alkali feldspar pegmatite monazite were 141.68±0.69 Ma and 137.62±0.73 Ma, respectively. This study reveals a distinct Nb-Ta metallogenic event associated with albitization and subsequent muscovitization of medium-grained porphyry biotite monzogranite, as well as a Li metallogenic event associated with granite pegmatite in the southern Jiangxi area about 140 Ma. This discovery broadens the prospecting technique and points in a new avenue for the exploration of rare metals in southern Jiangxi and probably across South China. It calls into question the widely held idea that rare metals in South China are mostly found in the late stages of the Yanshanian granite complex of mica-muscovite granite.