对于许多规模小、深度浅的地下人防工程．用地震反射波法查明它们在地下的分布和大小。在江西临川市某区，我们采用浅层地震反射波法，根据当地的场地条件、物性差异和干扰情况等，合理布置测线，选择恰当的激发和接收方式，进行适当的资料处理，得到了清晰的地震时间剖面。根据时间剖面上反映出来的反射空白区，较好地推断出了该区地下人防工程的分布位置和防空洞的深度、宽度等。为该区一高层建筑的基础设计提供了依据。 For many small, shallow depth of civil air defense works. Seismic reflection wave method to find out their distribution and size in the ground. In a certain area of ​​Linchuan City, Jiangxi Province, we adopted the shallow seismic reflection wave method to properly arrange the survey line, select the appropriate excitation and receiving methods and conduct appropriate data processing according to the local site conditions, physical differences and interference conditions, etc. A clear seismic time profile. Based on the reflection blank area reflected in the time profile, the distribution position of the civil air defense works in the area and the depth and width of the air-raid shelter can be inferred well. It provided the basis for the basic design of a high-rise building in this area.