Abstract: The cost of seismic acquisition technique with high density is high, especially 3 D seismic acquisition with high density. Therefore, it is of great importance to improve the efficiency of seismic acquisition and control the cost. In high-density seismic acquisition in mountainous areas, drilling, arrangement and migration of source wells are important factors influencing the acquisition efficiency. The first high-density 3 D seismic acquisition into mountainous area of the southern margin of Junggar basin was carried out, and the efficiency of seismic acquisition was improved by the use of small explosive quantity in shallow wells and single point detectors. The resolution and signal-to-noise ratio of the obtained seismic data are improved, which hence improves the imaging quality of complex structures and small faults.