Based on the experimental data of 2016 Fujian Nanyi reservoir airgun,we adopted the frequency domain water-level deconvolution method and cross-correlation time delay detection technique,studied the influence of level scaling factor and the background noise level of the station on deconvolution calculation results,and analyzed the effect of deconvolution on eliminating the influence of the source caused by different airgun pressures. The results showed that:① When the level scaling factor is smaller,the signal to noise ratio of the waveform after the deconvolution is smaller,but the identification error of travel time is greater. ② When the SNR of station record is higher,the recognition accuracy of travel time is higher,and the influence of SNR on the reference station record is far greater than the far station. When the SNR of the far station record is more than 10,the error of travel time is within 6ms,but when the SNR of the reference station record is 30,the travel time error may reach to 20ms. ③ When the airgun source difference is big,the frequency domain leveling deconvolution method has a better effect on eliminating the source influence,but the method error may be introduced when the source difference is small.