Abstract: The ^“2W1H^”(wide-band, wide azimuth and high-density) technique, a high-precision integration seismic exploration technology, presents requirements for matching theoretical concepts and technical processes from field data acquisition to data processing and interpretation. This paper provides basic definitions and technical specifications for the ^“2W1H^”technique, and points out its superior advantages in resolution, fidelity and inversion accuracy based on theoretical records and synthetic records. The technique can be used for description of reservoirs in areas with well-developed thin interbeds, prediction of fractures in areas with high anisotropy, and exploration of deeper targets or formations with special lithologic features. In addition, the technique may be used to enhance quality of structural mapping for formations with complicated structures. Application of the technique in 3 areas proved its importance in exploration, appraisal and development of complex oil/gas reservoirs. By enhancing quality of seismic data, the technique can effectively reflect configurations of complex reservoirs and distribution of fluids therein, so as to promote fidelity of the data.