Typhoons change the state of oceanic waves that excite microseisms propagating on land and is recorded by broadband seismometers. In this study,vertical seismic data retrieved from 114 broadband seismometers in Taiwan and Japan from 12:00:00 of July 3 to 00:00:00 of July 9 that are utilized as an example to study the power spectral characteristics of microseisms excited by #201601 typhoon Nepartak through the short-time Fourier transform. The analytical results show that the Power Spectral Density(PSD)of the vertical seismic data was significantly enhanced from July 5 to July 7. The enhancements are mainly observed at stations located in Taiwan,Ryukyu Islands and Yakushima,while the distances between the typhoon and those stations are ranged from 1500km to 2000km. The PSD increased at the frequency of 0.4Hz near on July 5. Thereafter,the enhancement of the PSD changes at the frequency from high(0.4Hz)to low and reaches to the frequency of 0.2Hz on the July 7. We used the Global Model of Seismic Noise Energy Radiation to simulate the power spectrum associated with the double frequency microseisms at the KGM station(128.22° E,26.76° N). The simulation results showed that the enhancement of the PSD changes at the frequency from high(0.4Hz)to low(0.2Hz)between July 5 and July 7,were caused by the reflection effect of the coastline.