Abstract:Full 3-D seismic data interpretation means solid interpretation of 3-D seismic data, namely "data volume interpretation". In other words, it is the visualized solid interpretation which starts from visualized 3-D display and takes geological body as unit. The 3-D data interpretation which is usually done on workstation is still the 2-D interpretation of 3-D seismic data, even the interpretation that takes surface slices can not be considered as full 3-D interpretation. I sketch the procedure of full 3-D seismic data interpretation and the necessary techniques involved. At present, we have had the basic conditions for full 3-D seismic data interpretation. The wide application of full 3-D seismic data interpretation will play a very important role in discovering big oil and gas fields.