From August 10,2019 to April 28,2021,a group of 57 linear concentrated distribution of geomagnetic diurnal induced currents and short-term in-situ recurrence anomalies occurred in North-south seismic zone and its adjacent areas of China. During the same period,a group of 6 earthquakes with magnitude 6.0 or above occurred in this area. The results from the studies of the relationship between them in this paper show that:①The whole group of overlapping anomalies can be roughly divided into four stages with times. The spatial distribution regions of the four stages have the characteristics of successive adjacent stages and the whole group has the characteristics of end to end. The distribution regions of the four stages are of left-rotation character over time. ②The variation of anomalous frequency and anomalous area of the whole group of overlapping anomalies is synchronous with time. The accumulation frequency and anomalous area of the whole group of overlapping anomalies gradually increase to the maximum in the first to third stage,and then decrease in the fourth stage. Five of the six earthquakes in the group,especially the largest one,Maduo 7.4,occurred in the attenuation period after the maximum accumulation frequency and abnormal area. ③Earthquakes may occur at any time during the whole group of anomalies,from about 2 years after a single anomaly in the group,to in the short term and impending stage after a single anomaly in the group;④ The spatial distribution of the whole group of overlapping anomalies is zonal,and the earthquakes basically occur at the edge of the distribution zone of the overlapping segment,at or near the densely populated area at the end of the overlapping segment. Based on overlapping anomaly mechanism we think that group overlap abnormal distribution of edge region is about 1~2 years before region with the guide of "activity" medium electrical stability of the high resistance zone between the electrical structure of the gradient zone,which has an important earthquake medium-term(1~2 years)even short precursory significance,because it is different from the relatively stable electrical gradient structure belt.