Yulong deposit is a super-large scale porphyry copper-molybdenum deposit in the Jin sha jiang-Hong he. In this paper， SHRIMP U-Pb technique was applied to date the ages of ore-hosted rocks and metallogenic process. The two dating results of ore-hosted biotite-feldspars porphyry are 43.0 ± 0.5 Ma（MSWD = 1.3） and 43.8 ± 0.7 Ma（MSWD = 2.6）.The age of quartz-feldspars porphyry rock which located in the north of Yulong deposit is 43.9 ± 0.6 Ma（MSWD = 1.19）. And the age of biotite-feldspars porphyry rocks which located in the south of Yulong deposit is 41.4 ± 0.6 Ma（MSWD = 1.6）. These results show that the main intruding episode of Yulong cu-hosted porphyry is about 43Ma. And there is a trend in the Yulong porphyry copper metallogenic belt that the episodes of the intruding rocks become younger from north to south. And the other diagenesis and mieralization ages of Yulong porphyry copper belt indicate that some other Cu-Mo-Au deposits could be find.