This paper analyzes the temporal and spatial variation characteristics of the short-term in-situ linear concentrated distribution of geomagnetic diurnal variation induced current anomaly near the epicenter before the Tangshan M_S4.8 earthquake in 2012,as well as its relationship with the earthquake,the middle and lower crust and the upper mantle. We further confirm that the trend of the short-term in-situ linear concentrated distribution induced current is consistent with the buried depth of the top surface of the middle and lower crust and the upper mantle. We believe that in terms of mechanism,the upwelling of deep thermal fluid leads to the separation and sliding of the crust-mantle high resistivity body,and the deep upwelling thermal fluid and the thermal fluid in the high conductivity layer invade the high resistivity area. There exists a short period of high-conductivity circulation channel in the high-conductivity layer. When the induced current of local magnetic diurnal variation scans through the high-conductivity circulation channel,the induced current will be concentrated in a linear distribution,and will be distributed near its top surface based on the skin effect. Considering the recurrence anomaly is the seismic anomaly occurring in the middle-lower crust and upper mantle high conductive layer below the source,we believe that this anomaly is different from the seismic anomaly near the source and from the source to the surface,which may play an important role in promoting the study of earthquake preparation and occurrence mechanism. It is also found that although the earthquake is mainly located at the end of the overlapping section,it is more likely to be located at the end of the overlapping section of the middle and lower crust. This finding is helpful for the application of this anomaly in daily seismic tracking to determine the future seismic location.