介绍陕西省周至地电阻率台址及地电观测环境和观测系统运行情况，分析汶川大震及其强余震前地电阻率出现的短临异常变化；记录到显著的地电阻率下降异常、地电阻率日均值均方差增大和差分能量增大的显著异常，认为周至地电台具有良好的监测地震能力。

This paper introduced the location andobservation environment of geoelectrical resistivity observation in Zhouzhi station and its short-term precursory anomalies before Wenchuan earthquake. From the recording, we got a remarkable decreasing anomalyof geoelectrical resistivity observation, andincreasing anomaliesof the first-order differential number and energy of geoelectrical resistivity daily value in Zhouzhi station, so we think this station have a good ability to monitor earthquake.