Using the data recorded by the seismic network of Handan,we analyse the seismic phase in the juncture area of Shanxi, Hebei, Shandong and Henan provinces, and use the software program to research the experimental data through spectral analysis. Then we get the method of distinguishing wave features of seismic phase between tectonic earthquake, explosion and collapse. The method is correct through a large number of test data. It provide thinking for improving veracity and availability of data.