Abstarct: Astaneh-Foulad Mahalleh intermountain depression with a length of 46 km and NE-SW trend, is located in eastern Alborz (northwest of Damghan). The width of this depression in the northeast and southwest sections, is 2.98 and 9.40 kilometers, respectively. Stratigraphic studies in this area confirm the existence of Mesozoic and Cenozoic rock units with the northeast-southwest trend. The faults in the depression and it’s surrounding with the northeast-southwest trend and steep dips to the northwest and southeast have contributed to creation of this depression. Including Astaneh, Southern Astaneh, Pishsar, Cheshmeh Ali, Sorkh Deh, Southern Siah Pareh and Sabour. These faults in the point of geometry and kinematics are similar to the Astane fault. So, all faults can be identified as the "Astaneh Fault Zone". Stratigraphic evidences these and fault plane morphology of some of these faults shows that the physiographic pattern of this zone is result of two old compressive tectonic regime in the first stage and a younge strike-slip neotectonics phase in the second stage. The old Compressional tectonic regime caused folding and reverse faulting with dips to the northwest (in the north of the depression) and southeast (in the south of the depression), and as a result, the Astaneh-Foolad mahaleh Compressional depression (footwall) between these boundary faults. The most important stratigraphic marker of this event is the establishment of the Triassic Elika Formation on Jurassic Shemshak Formation by the South Astana Fault. In the South Astana Fault in the south Astaneh village the Compressional phase, following the left-lateral strike-slip tectonic regime (in the Neotectonic-Quaternary time) has been printed on the pre-existing reverse faults. The effects of the new movement of these faults can be seen by the cutting of young sediments and the creating of very clear slickenlines with a little Rake (close to zero) on the fault surfaces.