Abstract: In this paper we first introduced the geoelectric field observation network in Jilin region, and then statistically analysed the basic characteristics of the observed geoelectric field changes. The results show that: ① The typical daily variations of geoelectric field are recorded at most of stations as the type of “peak-valley-peak”, and the morphological changes are simultaneous in time; ② The obvious simultaneous changes during the electrical storm are recored at all the stations, and the simultaneous changes during weak magnetic disturbance at several stations of approximate north-south distribution ; ③ It is obvious that the change range of geoelectric field follows a annual change pattern, and the variation ranges differ from each other; ④ Under normal state, the results of data correlation in the same direction between stations are good.

Key words: Geoelectric field, Changing characteristics, Jilin region