Based on the seismic data in A Block in Daqing oilfield, the cross-well seismic data acquisition method is introduced in this paper. With the study to the difficulties of data processing and the corresponding processing methods, such as cross-correlation stack, wave field separation, direct wave tomography and reflection image, a set of practical processing methods are summarized. After merging the cross-well seismic sections of three wells, it can be found that the joints of the cross-well seismic section are not obvious and the seismic events are continuous, showed the relatively higher resolution and signal to noise ratio and demonstrated the feasibility of the processing method.