Abstract: First, this paper has discussed the propagational characteristics of every seismic wave in detail according to the basic theory of the seismic wave propagation. Secondly, according to the characteristics of every wave, it has discussed the applied premise, the applied range and the field working method of every exploration mathod: the shallow raflection method, the shallow refraction method, the diving wave profile method and the PS velocity logging, and has discussed some application examples combining our work in latest several year. These methods have solved many geologic problems and engineering problems in practical application, and have provided necessary reference material for the city seismicity division and the choice of construction sites, and have achieved better results.