Abstract: In this paper, the regional full waveform inversion using the broadband waveforms recorded by China Seismic Network were conducted, and the focal mechanism solutions of the 26 earthquakes with M≥4.0 occurred in the mainland of China during August to October 2023 were obtained. The types of these focal mechanism solutions show 9 reverse faulting, 14 strike-slip faulting and 3 normal faulting.