To overcome the challenging problem of picking accurate absolute arrival times on the phase weighted stacking waveforms from repeating active air-gun sources，we propose to take advantage of waveform similarity of the stacked data on stations to determine accurate station-pair differential arrival times by waveform cross correlation. Subsequently they can then be used directly to image velocity structures using the newly developed station-pair double-difference tomography method. We tested this method with the data recorded on the Lujiang seismic network from the Yangtze River Active Source Experiment in Anhui. We found that we could get more accurate station-pair differential arrival times with the waveform cross-correlation method than the manually picked arrival times. With the station-pair double-difference tomography method，we obtained the three-dimensional velocity model of the crust around the Lujiang seismic array，and then determined the relatively large-scale geological structures of the Lujiang area.