Based on expatiating the dynamic characters of groundwater level,we analyzed the period of groundwater level variation by the spectrum analysis method,also made the optimization on observation frequency of groundwater monitoring network in the plain of Shiyanghe River Basin.

Through analyzing the dynamic characteristics of groundwater in Linfen City, this paper points out the main factors influencing the dynamic state of groundwater, and analyzes the dynamic types of groundwater and the typical dynamic process curve of well-water level.