In the loess plateau area located the south of Ordos Basin, the surface structure is complex, the seismic wave absorption and attenuation are serious, many target layers in vertical direction, low-amplitude structure, heterogeneous reservoir, micro-fracture, thin interbed and other aspects are different, so the prediction accuracy is low.,Karst pores and fractures are small and difficult to identify. Therefore, the integrated technology of high-density 3D seismic acquisition, target processing and comprehensive interpretation has been systematically developed in this area. In terms of acquisition, based on the design of optimal acquisition scheme for geological target, an observation system with small combination, moderate bin size, wide azimuth and high coverage is adopted, and a "well-seismic combination" broadband excitation and full node reception is applied to improve the resolution of seismic data on the basis of ensuring certain signal-to-noise ratio. I In terms of processing, high precision fusion static correction technology, characteristic noise attenuation technology, and weak signal imaging technology under coal seam shielding are used to get high quality seismic data on the basis of fidelity and amplitude preservation. In terms of comprehensive interpretation, according to the seismic and geological characteristics of faulted bodies and the main controlling factors of upper Paleozoic reservoir formation, high resolution reservoir prediction and high precision fault identification and trap description techniques are established. Finally, in the loess tableland, a major technological system of high quality and efficient seismic exploration is established, which substantially promotes new discoveries of oil and gas exploration and efficient development of oil and gas fields.