The present study was carried out with the title “Spectral analysis of 25November 2018 Sarpol-e-zahab earthquake in western Iran” in which the seismic energy were determined by using body-wave spectrum. The 25 November 2018 Sarpol-e-zahab earthquake, Mw=6.3, occurred at 16:37:37.1 GMT, in western of Iran. Zagros is under the influence of deformity. According to Harvard’s data, the depth of the earthquake is 15.4km. moderate- to large-magnitude earthquakes in the Zagros are concentrated along particular structural-geomorphological features and topographic fronts at the surface. by using body-wave spectrum of seismic data recorded at stations within the country and using the corner frequency and amplitude of body-wave spectrum, seismic energy for 4stations are calculated 3.7×〖10〗^11Joule.