Abstract: During the seismic prospecting in complex mountainous areas, complex surface leads to more shot point and geophone station offset. So it is very difficult to control field quality precisely with conventional methods. This paper mainly elaborates a new set of quality control flow using existing software---first break fitting, thus completing the quality control procedure and accomplishing quality control of shot point location in the fields. Due to the complexity of the areas, signal-to-noise ratio and resolution are relatively low, and data vary a lot, so it gets more difficult for processing. During the process, some key field processing techniques are adopted, i.e. phase adjustment, denoising, amplitude recovery, energy compensation, velocity optimization, residual static correction, and poststack random noise attenuation, improving the signal-to-noise ratio and resolution. Therefore, good results are obtained

Key words: first break fitting, position monitoring, data quality, processing flow, complex mountainous areas