Abstract: The studied metagranitoids are located in the ultrahigh pressure metamorphic belt in the Dabie Mountains and belong to sub-alkaline granites. They are chemically rich in SIO2 and poor in CaO and AL2O3 The surrounding rocks are ultrahigh-pressure metamorphic gneisses with eclogite enclaves．The total REE contents of the most samples are(100～200)x10-6 ．All samples have obviously negative Eu anomalies ．Their protolith was originated from Neoproterozoic ganites．Combined with geochemical characters of the metagranitoids，they are thought to be relatd to paleo-orogeny．There are numbers of metamorphic overgrowth zircons in the granitoids， which are composed of mixing magmatic core and metabolic overgrowth rim. Combination of mineral chemistry and U-Pb ages of zircons indicates that the metagranitoids were or inated and metamorphosed from paleo-granites，but not Mesozoic remelting granites formed later than ultrahigh pressure metamorphism．There are two kinds of garnet in the rocks,one is poor in Mn，another is rich in Mn．By using geothermobarometry of garnet-botite and garnet-phengite mineral pairs，it can be proved that metagranitoids underwent metamorphism at pressure 0．6～0．8GPa and temperature 420～ 500℃. Some indirect evidence shows that the metagranitoids might have experienced a Mesozoic ultrahigh pressure metamorphism ．