Abstract: Surface dynamics and tectonic geomorphology can indicate tectonic activity of a region. By using analytical capability of a MATrix LABoratory (MATLAB) toolbox in conjunction with Shuttle Radar Topography Mission Digital Elevation Models (SRTM DEMs) some parameters of tectonic geomorphology were extracted. Also, extracted drainage networks and sub-basins were analyzed. The aim of this study was the evaluation of surface dynamics and tectonic geomorphology conditions of the study area in southwestern Zagros mountains, Iran. In this order, some parameters such as isobase and incision maps were extracted for the generation of morphometric maps for surface dynamics and basin analysis. Also Stream-length gradient index (SL) was analyzed and hypsometric analysis performed for mapping tectonic and lithologic effect on drainages and basin hypsometry. A morphotectonic interpretation of the Behbahan Region (SW Iran) is performed and the findings indicate a high correlation between surface dynamics and basin analysis parameters with neotectonics features in the study area.