AbstractThe reason why seismic prospecting on loess plateau have become a world problem is that the geology conditions of surface and near surface are very complicated, and the seismic wave excited in loosen loess layer is weak in energy, and attenuate very quickly while propagating through loosen loess. Besides, the geology character of loess plateau is the cradle of surface wave, refraction wave and multiples. All these factors lead to one consequence: the S/N ratio is terribly low. To solve this problem, the key point is to choose right excite parameters, and plus proper geometry parameters.