Abstract: The seismic reflection events can be detected based on the seismic attributes such as dip angle and azimuth information, and all seismic data cube can be traced within the limits of the normal interface. In addition, the stratigraphic interface with higher resolution than seismic data can be generated, and be arranged in stratigraphic sequence to form the chronostratigraphy. Because the chronostratigraphic resolution is higher than the resolution of seismic data, geologist can analyze clearly the sedimentary sequence stratigraphy, and isochronal geological bodies can be engraved on the seismic data. Therefore, chronostratigraphy can be used to trace sand bodies formed in all kind of geological depositional background. With chronostratigraphy algorithm and calculation parameters optimization, chronostratigraphy framework has been established, and the top and bottom interfaces can be traced through well logging interpretation. In addition, chronostratigraphy of sand body can be traced on multiple sections of the seismic data, and the sand body description is finally finished. Through this study, the chronostratigraphy research method suitable for sand body description in background of delta deposition has been developed.