The Bohai area is one of the relatively active regions in eastern China,with frequent strong earthquakes in history,which has been classified as a key earthquake-prone region,and its seismicity draws much attention. Recently,there have been many felt earthquakes. Therefore,it is critical to understand the focal rupture features of those earthquakes and investigate the distribution of the modern tectonic stress field to provide scientific reference for estimating the future earthquake risk. In this paper,we use the waveform inversion method to calculate the focal mechanism solution of the M≥3.5 earthquakes from 2010 to 2022 to supplement related data based on the results of previous research and invert the regional tectonic stress field with the MSATSI software package. The results suggest that the recent events are mainly the strike-slip mode,followed by the normal faulting,which is consistent with the kinematic features of the main fault zone nearby. The dominant orientation of the regional tectonic stress field is NEE,which is consistent with the regional tectonic stress field in North China. The overall stress field is relatively stable,and there are some local differences in the locality,which is related to the small number of earthquakes and the uneven distribution in the sea area. Furthermore,the shape factor R-value is relatively low,indicating the regional crustal stress is dominated by tensile stress.