The absence of direct evidence for early Paleozoic magmatic activity within the South China orogenic belt has sparked considerable debates. These debates center around, the timing of the collisional amalgamation between the South China orogenic belt and the Yangtze block, the early Paleozoic tectonic setting, and the belt' s potential affiliation with Gondwana. Consequently, the discovery of Pan- African magmatic rocks has become crucial in resolving these questions. This paper focuses on the petrographic characteristics, zircon U- Pb geochronology, whole- rock geochemistry, and Lu- Hf and Sr- Nd isotopic signatures of the Wutong pluton, located north of the Zhuguangshan batholith. The results reveal that the pluton primarily consists of biotite monzogranite with a crystallization age of about 494. 4 Ma. Geochemically, it exhibits high silica and alumina content (SiO2=59. 93%~71. 31%, Al2O3=13. 43%~19. 20%), high alkali content (K2O=3. 35%~5. 93%, Na2O=2. 33%~6. 21%), and high iron content (TFe2O3=2. 09%~6. 20%), while displaying low magnesium content (MgO=0. 44%~2. 18%). The rock mass is enriched in Rb, Th, U, Nb, and LREE, and depleted in Ba, Sr, P, and Ti. These geochemical features suggest that the magmatic source material was mainly derived from the remelting of lower crustal rocks, potentially involving the multiple remelting events. A minor contribution from mantle- derived material during magma intrusion is also evident. This discovery suggests that the collisional amalgamation between the South China orogenic belt and the Yangtze block occurred during the early Paleozoic (520~480 Ma), likely along the margin of the central part of Gondwana. This study provides valuable insights into the timing, characteristics, magma genesis, and tectonic setting of the Pan- African orogenic event in the South China orogenic belt and may contribute to a better understanding of the region' s geological history.