Abstract：The resolution is an important technical index measuring the quality of seismic data. The job of improvement of inline resolution has been gradually transited from traditional acquisition and processing methods to that mainly taking smaller spatial sampling rate of wave field. In recent years, the people have two kinds of knowledge for improvement of inline resolution by minor bin size acquisition technique: one is to consider the formula, expressing the relationship between the highest Nyquist frequency and bin size in 3-D seismic exploration, can express the relationship between bin size and inline resolution; the other is to consider the migration can improve inline resolution. For that reason, analyzed systematically the relationship between bin size and inline resolution by practical data and forward physical models, the authors pointed out that the minor bin size itself does not improve the inline resolution and the nature of improving inline resolution is to improve S/N ratio in high-frequency ends by bin size stack and then to improve inline resolution
