Abstract: The Upper Paleozoic in Erlian Basin has a promising prospect for exploration. However, the existing old seismic data are weak in reflection signal and low in signal-to-noise ratio resolution. To solve this bottleneck, a series of processing methods are developed, which are focused on model constrained static correction, prestack noise suppression, prestack amplitude compensation for deep signals, well controlled velocity modeling, and anisotropic prestack time migration with curved ray tracing. The re-processed seismic profiles show an improved imaging for interpretation of buried depth, configuration and inner structures in the Upper Paleozoic, laying a technological and data foundation for study of the geological characteristics.