Abstarct: Do-Chah mextamorphic-igneous complex (DMIC (cropped out in the southeast of Shahrood and northern edge of the central Iran structural zone, and includes a wide compositional range of mextamorphic rocks such as mextabasite, mextapelite, mextacarbonate and mextapsammite, which hosting leucogranitc and biotite-granitic intrusions. mextapelites of the DMIC include wide variety of rocks that consists of the micaschist, garnet micaschist, chloritoid schist and gneiss. mextamorphism grade in the highest degree resulted in anatexy and producing of granitic melts. mextabasites of the Do-Chah complex evolved from igneous mafic protolith such as submarine basaltic lava flows, diabasic swarm dikes and small-scale gabbrodioritic intrusions and include greenschist, amphibolite and garnet amphibolite. The DMIC complex covered by the Late Triassic– early Jurassic sedimentary sequences. This complex intruded by late Neoproterozoic and middle Jurassic diabasic dike swarm and gabbrodioritic small-scale intrusions and also middle Eocene trachyandesitic dikes. baxsed on carried out thermobarometry calculations on the mextabasitic samples, P-T range of 387-636 °C and 2.7-11 Kbar pressures obtained for stopping of exchange and final equilibration of their mineral phases. By using of the Ti-in-biotite geothermometer, temperature range was calculated in the range of 429 to 646°C for stopping of exchange and final equilibration of their mineral phases. baxsed on the mineralogy evidence and thermobarometry, the mextabasites and mextapelites have undergone a medium pressure Barrovian type progressive regional mextamorphism. Carried out thermobarometry calculations on the cutting DoChah complex trachyandesitic rocks with middle Eocene age, indicate a P-T range of 672-770 °C and 4.43-7.3 Kbar pressures for stopping of the final crystallization. U-Pb zircon dating on the mextabasitic sample yields 238U/206Pb ages of 934 to 526 Ma and 325 to 204 Ma, this sample was probably have been volcanoclastic nature, because it shows inherited ages. mextapsammites yield age populations of 2790, 2412 to 1565 and 941 to 539 Ma. Granitic samples yield concordia ages include of 486±8, 514.9±5, 508.3±6.7 and 499±21 Ma, correspond to early Cambrian. baxsed on the obtained ages and the ages of the adjacent complexes with similar associated rocks, it is better to consider the Late Neoproterozoic – Early Cambrian age for DMIC. The older ages are mainly inherited ages. Obtained young ages likely indicates loss of Pb or subsequent imposed events on these rocks. U-Pb dating obtained on the extracted zircons of trachyandesitic sample determined the age of 43.51± 0.58 Ma correspond to middle Eocene. The sum of the field evidence, geochemical results and isotopic age dating indicate that at end of Neoproterozoic, intracontinental extensional basins formed, and the early sedimentary sequences of the protolith of the DMIC deposited in them. These mentioned basins often didn’t experience of the formation and extension stage of the producing oceanic lithosphere, and then due to the dominance of the compressional tectonic regime, rapidly closed. The mentioned basins, mainly didn’t reach to generation of oceanic lithosphere, and closed in relation to compressional tectonic regimes. During in these processes, these basins obducted in the form of accretion prisms and emplaced on the continental plates. These rocks have evolved into a collection of mextamorphic rocks and affected by partial melting and resulted in granite formation. Eventually, DMIC underwent deformation and mylonitization.