According to the Brune model，we calculated the near source apparent stress of earthquakes with ML≥2. 0 which occurred during 2001 ～ 2011 and analyzed the temporal and spatial variations of apparent stress in Shanxi Province． The waveform data are gotten from the Digital Seismic Network of Earthquake Administration of Shanxi Province． We discussed the difference of apparent stress values before and after M≥4. 5 earthquakes since 2001． The timedependent apparent stress curves show that high apparent stress value occurred one year before five earthquakes with magnitude larger than M4. 5． The apparent stress values at the source areas follow a pattern which increases first and then decreases; the spatial change of apparent stress shows that highly centralized large apparent stress values and large apparent stress gradients are found at near source area before five M≥4. 5 earthquakes，and the earthquakes occurred at the area which has large apparent stress gradients，which implies high energy accumulation and apparent tectonic stress increasing in the source area． The change of apparent stress values illustrate the stress evolution progress in the source area，which can be used in seismic risk analysis．