Shiguan migmatite of Yuexi County, belong to the part of former North Dabie Complex. The result of zircon SHRIMP U-Pb dating shows: the first time of metamorphism is 232Ma, equivalent to early period of Late Triassic, and the second time of metamorphic is 207Ma, equivalent to late period of Late Triassic., There are prosodic clitellum in Composite core of zircon (inherited zircon) ,and that’s detrital zircons from the magma, the age value of 560、444、394、378 and 331Ma respectively. These phenomena suggest that the original rock is not magmatic rocks, but sedimentary rocks. Research findings also showed that the Shiguan migmatite of the North Dabie has gone through two times of metamorphism: 1) ultra-high pressure metamorphism, the time of 232 Ma (n = 5, mean age); 2) retrograde metamorphism, the time of 207Ma. the time of the two times of metamorphism is consistent to time of ultrahigh-pressure metamorphic and retrograde metamorphism in Sulu region.