Abstract: Ground fissure disaster is one of the main environmental geological hazards in Xi'an, which influence the using and planning of land in the urban construction. In order to research the characteristics of the dynamic effects of ground fissures, this paper chooses the F₆ ground fissure site as the research object. After finishing the field test and the spectrum analysis of micro-tremors, we analyze the acceleration amplitude, excellent frequency, amplification effect and other dynamic response characteristics of the ground fissures. The research shows that there is no obvious relationship between the frequency of the test site and the position of the measuring point. The excellent frequency of the Fourier spectrum is around 2.79Hz, and the excellent frequency of the response spectrum is around 4.17Hz. Nearby the ground fissure region, the dynamic response of ground fissure site has obvious amplification effect. The influence range of hanging wall and footwall is around 15m. The amplification factor of hanging wall is greater than that of footwall, in which the amplification ratios of the Fourier peak are 1.92 and 1.81, the amplification ratios of the response spectrum peak are 1.68 and 1.63.