Due to the high seismicity in Iran, especially in the vast Zagros belt (26 to 38 degrees latitude and 45 to 58 degrees longitude), many earthquakes have been recorded in the networks of the Iranian seismological center (IrSC). Therefore, the waveforms of earthquakes recorded in these networks have been used to study the seismic structure of the crust (including tectonic features and major faults) in this indicated zone. For this purpose, Rayleigh wave velocity dispersion curves resulting from the selection of relatively high quality seismographs (with signal-to-noise ratio higher than 4/SNR>4) have been used to obtain Rayleigh wave velocity structure maps by surface wave arrival time tomography.These local dispersion curves for even node points are then used to retrieve the shear wave velocity model. These maps have been provided in periodic periods of 1 to 28 seconds and up to a depth of 27 km beneath the surface in the Zagros zone. Thick sedimentary basins and major fault systems, including mountain frontal faults (MFFs), generally show low-velocity anomalies. While the middle crustal structures below the Sanandaj-Sirjan and High Zagros (HZF) zones, which may be related to the Arabian plate underthrustingcentral Iran, show high-velocity anomalies.