Objectives:Lengshuikeng Pb—Zn—Ag orefield is located in the Tianhuashan volcanic basin, which is in the northwestern of Wuyi uplift belt. It is also in the south of the suture zone between the Yangtze Block and Cathaysia Block. Lengshuikeng Pb—Zn—Ag orefield is a unique porphyry deposit in the Mesozoic volcanic belt of the Northern Wuyi Mountains, and the volcanic rocks in the orefield are widely distributed, but the geological age and stratigraphic attribution of the volcanic rocks are still lack of unified understanding. Methods: Based on detailed field observations, we carried out a detailed SHRIMP zircon U- Pb chronological study of the rhyolite from the Ehuling Formation in the Lengshuikeng Pb—Zn—Ag orefield. Results: The results show that the n(206Pb)/n(238U) weighting average age of the rhyolite in the orefield was 139.5±1.1 Ma, 137.8±1.3 Ma and 139.4±1.2 Ma. Conclusions: They belong to the early stage of Early Cretaceous. The volcanic eruption has the form of eruption such as gas explosion and slurry explosion, which are represented by different types of eruptions such as Pliny. Stonebury and Urcano type, etc., and the crystal chips from different sources in the volcanic clastic rocks are formed. The proportion of cuttings and scraps is different, which leads to different geological meanings of the minimum zircon U- Pb age, which may not necessarily represent the age of formation of volcanic clastic rocks. Combined with U- Pb age data for zircon of granite porphyry and tuff, we present that the early stage of Early Cretaceous zircons represent the rhyolite’s formation age, it shows that the Lengshuikeng Pb—Zn—Ag orefield occurred volcanic activity in early stage of Early Cretaceous. However, it remains to be discussed whether there is any Late Jurassic volcanic rock series.