LA-ICP-MS U-Pb isotope dating of volcanic single zircons from the Early Cretaceous Jiande Group in the Zhoucun—Yanxia cross section, Shouchang basin, western Zhejiang, SE China, at State Key Laboratory of Mineral Deposit Research, Nanjing University shows that the Jiande Group was formed during 134~115 Ma, the middle—late time of the Early Cretaceous. Subdividedly, the Laocun Formation (Fm.), Huangjian Fm., Shouchang Fm. and Hengshan Fm. were dated as 134~125 Ma, 125~118 Ma, 125~121 Ma and 121~115 Ma, corresponding to the Hauterivian—Barremian, early—middle Aptian, early Aptian and middle Aptian in age, respectively. However, the Jiande Group could range down to the lowest Upper Jurassic if the 4th bed (150~133 Ma) of the cross section is considered as a part of the group. It is proposed that the Huangjian Fm. is the coeval volcanic sediment to the Shouchang Fm. and the Hengshan Fm. in space, but does not succeed beneath or above in sequence as former worker’s thought. It is suggested that the Shouchang Fm. deposited in both the Shouchang basin and the Lishui basin was almost simultaneous, and the Hengshan Fm. is roughly correlative with the Guantou Fm. in temporal.