Halahu is located in the Tibetan Plateau.The results of geological survey, AMT (Audio Magnetotelluric Sounding) and geochemical survey show that there is good perspective of natural gas hydrate prospecting in this area.High-precision seismic reflection experiments were carried out in search for natural gas hydrate in the area.1 200 receiving channels, 2 m group spacing, 1 m offset, 8 m shot spacing, 150 folds, the surveillance system excited in spread middle were used in reflection seismic survey.60 Hz geophone string (with 6 geophones) was adopted, each received channel receiving seismic wave in the form of point array.Excitation source was large vehicle-borne Vibroseis.Instrument recording factors used included 0.5 ms sampling, 2 s recording length and whole-band receiving.The high S/N ratio and resolution as well as obvious structural form characteristics were provided with seismic section obtained by the method.Validate hole location was determined according to land feature and the permafrost thickness, fault structure and high-speed distribution reflected on seismic profile as well as other data.