As cross-well seismic exploration can avoid the impact of the low-velocity layer and weathering layer, it can acquire relatively high frequency seismic signal. After processing, fairly high resolution velocity and reflection imaging can be obtained. During 2004-2005, eight cross-well seismic profiles were processed in Ken 71 Block, Shengli Oil Field. In accordance with the characteristics of raw data, the authors studied tomography, tube wave attenuation, VSP-CDP and finite angle stack, and completed the cross-well seismic data processing. The analysis and interpretation of the final results show that cross-well seismic exploration can recognize small faults, small structures and thin reservoirs between two wells.