Abstract: Junggar basin is characterized by complicated seismic data, non-uniform datum level and iregular data quality. The amplitude normalization of oniginal seismic data is conducted so as to unify the datum level to a constant water level, thus forming a set of seismic database with good quality and uniform datum for the purpose of meeting the demand of research and production nowadays.

Key words: complexity, normalization, datum level, closing discrepancy