The signal-to-noise ratio and resolution ratio of seismic data acquired from the deep layer of Liaohe basin are relatively low due to the peculiar seismic geological conditions, which has greatly restricted further exploration and development of the Liaohe oilfield. In order to break the restriction of seismic data quality for exploration and enhance the signal-to-noise ratio and resolution ratio, research workers of the Liaohe oilfield chose northern Oulituozi in the eastern sag of the Liaohe basin as the study area and employed a series of techniques such as optimum lithologic excitation, useful weak signal protection and variable geometric acquisition to conduct the test. The result is proved to be quite satisfactory.