The formation of Zhongchuan gold deposit is located in the eastern section of Lixian-Minxian gold ore belt. There is a close relationship between the mineralization and Zhongchuan granitic complex. Using high resolution and high sensitivity of ion microprobe(SHRIMP) testing technology, we acquired accurate ages of Zhongchuan granitic complex and gold deposits by SHRIMP U-Th-Pb zircon dating method. The main intrusion age is 210～160 Ma(95% confidence, MSWD=1.4), and 3 zircon(4 points)SHRIMP test results show the exact age of Zhongchuan area of gold mineralization is 197～162 Ma. The discrepancy of ages indicates that, Zhongchuan gold deposit formed later than the Indosinian-Early Yanshanian Zhongchuan granitic complex. The ages and other geological evidences both suggested that South Zhongchuan should be classified as the Carboniferous strata. Therefore, it could be concluded that Luchuba, Baijiazhuang, Lüjing, Jiaochangba, Wequan, et al. exocontact zones have great potential for gold deposit.