Abstract：This paper introduces the three main procedures of the cross-holeseismic technology, i.e., seismic data acquiring, processing, imaging, and the application of some
new techniques. The new technology does not only develop oil-gas reservoir information but also fills the blank of it. What's more, it plays an irreplaceable role in highresolution
well-to-seismic calibration and reservoir production monitoring. This paper at last discusses the difficulties facing the currently-used cross-hole seismic technology,
and points out that it is the development trend to integrate the cross-hole seismic technology, the terrestrial 3-D technology, and the well logging technology.