The southwestern Sulu terrane in eastern China is divided into four fault-bounded lithological units, which are from northwest to southeast orthogneiss unit (Unit Ⅰ), supracrustal rock unit (Unit Ⅱ), kyanite_bearing quartzite-marble unit (Unit Ⅲ) and paragneiss_schist unit (Unit Ⅳ). Inclusions of index minerals in zircon separates of 93 samples from these units were identified by means of laser Raman spectroscopy and electron microprobe analysis. Coesite and coesite-bearing ultrahigh-pressure (UHP) mineral assemblages occur in zircon separates of various amphibolite-facies metamorphic rocks within Units Ⅰand Ⅱ, whereas aragonite- and phengite-bearing high-pressure (HP) mineral assemblages are preserved in zircons within many amphibolite- to greenschist-facies metamorphic rocks in Units Ⅲ and Ⅳ. All the above evidence together with previousstudies yields p-T estimates of peak metamorphic recrystallization at 723～852℃ and p≥2.8×103 MPa for UHP rocks, and at 500～600℃ and p=1.2×103～2.5×103 MPa for HP rocks. The spatial distribution of these p-T estimates and recent surface mapping result constrain an exact boundary between UHP and HP belts within southern Sulu terrane along a ductile shear zones in Donghai region.