This paper analyzed the characteristics of ambient noise on the east side of Xar Moron fault zone according to three key values: root mean square (RMS) of velocity at 1-20 Hz, power spectral density (PSD) of acceleration, and corresponding probability density function (PDF). The continuous data were recorded by 26 mobile seismic stations in the study area set up under the project "ChinArray-eastern North China". The results indicate that the temporal and spatial distributions of ambient noise in the study area show various characteristics at three different frequency bands: (1) The temporal and spatial distribution of ambient noise in the high frequency band is significantly different, and the noise source mainly comes from human activities. (2) The ambient noise in micro-seismic frequency band mainly comes from marine activities. The temporal and spatial distribution of ambient noise at high-frequency micro-seismic frequency band has no difference, while that at low-frequency micro-seismic frequency band has certain difference, which is due to the temperature change and micro deformation of observation wells; the difference is more prominent in the daytime than at night. (3) In the low frequency band, the three-component noise in the daytime is larger than that at night, and the level and dynamic range of noise in the horizontal direction are higher than that in the vertical direction, for the influence of ambient temperature change and ground tilt in the daytime is greater than that at night, and the horizontal direction is more sensitive to temperature and ground tilt than the vertical direction.