Har Hu area is a part of the frozen soil region of the Tibetan Plateau.The results of geological survey show that there exist favorable accumulation conditions and prospecting potential for gas hydrate in this area.Therefore,high-precision shallow seismic reflection experiments were carried out in this area,with the selection of KZ-28 large vehicle-borne Vibroseis.By analyzing the seismic geologic conditions of the test area in combination with the depth of the shallow seismic exploration and the characteristics of the reflection waves of the target layer,the authors studied the number of the vibration sources,the scanning frequency,the scanning length,vibration number and the driving amplitude before the seismic profile acquisition,and the seismic records obtained by different single excitation parameters were compared and analyzed.Under the prerequisite of satisfying the detection requirements,the seismic exploration can be determined for the purpose of maximizing the seismic record resolution and SNR.The optimal excitation parameters of the Vibroseis are 1 vibrator,2~3 sweeps,the sweep frequency is 8~100 Hz,the sweep length is 12 s,and the drive level is 75%.