This paper presents the petrologic, whole-rock geochemical, zircon U-Pb dating and Hf isotopic data of host granites and dioritic enclaves from the Huitong pluton, southern Jiangxi province. Zircon U-Pb dating results indicate that the dioritic enclave (425.0 ±4. 1Ma), is coeval with the host granitoid (425.8 ± 6.2Ma), which is during late stage of Early Paleozoic. The Huitong granitoids are belong to peraluminous ( A/CNK - 1.05 - 1.28 ) and high-K calc-alkaline series. They are enriched in Rb, Th, U, K, and Pb, and depleted in Ba, Sr, P, and Ti, with significant Eu negative anomaly. The rocks show S-type granite affinities. The zircon εHf(t) of host granites ( - 13.7 - -3.3) and dioritic enclaves ( -8. 4 - -3.2) are all negative values, with Hf crustal model ages ranging from 1.6Ga to 2. 3 Ga. Combined with previous data, a wide range of mature crust anatexis events took place in the southern of Jiangxi Province during Early Paleozoic. The partial melting of middle-lower crust finally formed the Huitong pluton, in a post-orogenic extension tectonic environment.