River instability needs to be evaluated on spatial and temporal scales. It must be recognized that rivers differ among themselves, and through time, and one river can vary significantly in a downstream direction. Morphology and behavior of drainage network, to change from neotectonic is sensitive. Meanwhile meanders of delta levels are the most unstable areas of the rivers.Tectonic deformation causes change in channel slope, which in turn is responsible for variations in channel morphology, fluvial processes, and hydrological characteristics of a river system. River responses to active tectonics produce characteristic geomorphological features revealing surface deformation in any area. The study area is located in Hormozgan province and north coastal of Hormoz strait. Kol River with the formation of a relatively large delta, flows from north to south and arrive to the Strait of Hormoz. The purpose of this study is recognition evidence and evaluation of neotectonic in Kol river drainage network. In this paper rely on results based on field survey and index of geomorphic, morphology and riverbed changes, Kol River has been studied.