Using the broad digital data recorded by Shangdong digital seismic network, selected network since 2007, recording the lower limit as M_L 2.0 digital seismic waveform data, we calculated the stress values and moment magnitudeMw for each earthquake,and analyzed the correlation between them; we combined Shandong geological structure and characteristics of seismic activity, and analyzed stress field distribution and temporal and spatial variation of Jiaodong Peninsula and the northern waters , the northern region of the South Yellow Sea, Yishu belt regions, Shandong and Henan border region, And explored the regional characteristics and the relationship with seismic activity.