Abstract：Interborehole seismic tomography has become a new interesting technique in seismic exploration because of its particular observation and the resolution which is much higher than that of surface seismic data. Having studied much literature.I discuss seismic tomography in the following points; ·exact definition,characteristic and technical contents; ·case history,advantages and its inevitable generation; ·equipment requirement in interborehole seismic measurement, the states of borehole source and geophone system.the merits and deficiencies of the equipments, and the basis of determining field parameters; ·classification.status quo and development tendency.application prospects.
