By　means　of　field　structure　analysis,　TEM　and　fabric,　we　have　studied　deformation　features　and　mechanisms　of　the　ultrahigh-pressure　rocks　in　Dabie,　thus　constructing　the　exhumation　PT＇tD　path　of　ultrahigh-pressure　rocks.　The　Dabie　ultrabasic　rocks　coexisted　with　ultrahigh-pressure　eclogites　have　undergone　high-temperature　deformation　as　well　as　lower　one,　of　which　the　olivins　have　developed　high-temperature　glide-system[001](100)　and　low-temperature　one　[010](100).　The　well-developed　dislocation　structure　of　omphacite　in　eclogite　means　that　the　eclogite　has　undergone　dislocation　creep.　The　dislocation　density　of　ompahcite　is　4.98×107/cm2.　The　subgrains　of　omphacite,　the　boundary　of　which　is　often　uneven　and　intertwined　with　the　mother　grains,　have　rotated　to　dynamic　recrystallization　grains.　Fabric　of　omphacite　indicates　that　the　intracrystalline　ductile　flow　has　formed　[001]　pole,　which　is　parallel　to　lineation　and　belongs　to　L-type　constriction　fabric.　The　main-phase　deformation　of　eclogite　is　co-axial,　but　some　asymmetry　strain　has　also　existed　due　to　the　strain　partitioning　in　Dabie　orogenic　belt.　The　Flinn　plots　indicate　that　the　omphacite　strain　is　belongs　to　constriction　ellipsoid　denoting　stretching　strain,　being　similar　with　the　result　of　omphacite　fabric　analysis.　The　garnet　has　a　dislocation　density　of　3.54×107/cm2　and　some　of　the　garnet　in　certain　eclogites　have　developed　recrystallization.　The　stresses　of　ultrahigh-pressure　rocks　during　different　exhumation　stages　have　been　deduced　from　the　subgrain　or　dislocation　density　of　deformation　quarltzs　in　different　ultrahigh-rocks.