Investigation on seismic parameters of an area can provide valuable information on the distribution of stress and the location of future earthquakes on that area. In this study, using earthquakes catalogue of NW Zagros as a seismotectonic province in west of Iran for the period of Sep. 2017 to Jun. 2018, we estimated the parameters related to the seismic attenuation of aftershocks for the specific magnitude will be obtained based on the modified Amori’s equation. Although attenuation parameters of c and k are strongly influenced by the number of records but the p-value was determined in the range of 0.69-1.18.