Based on the broadband records from Fujian Digital Seismic Network, the focal depths of M_L ≥ 3.5 earthquakes in Shunchang area, Fujian Province, during 2007-2017 were determined using the sPL phase. Based on the focal mechanism solutions of these earthquakes, combined with the velocity model of the study area, the F-K method was used to calculate the Green's function at different depths in the corresponding epicentral distance; the theoretical waveform of sPL phase at different depths were then obtained. According to the characteristics of the sPL phase, the broadband records of stations within 30-50 km of the epicenter were selected and filtered. They were compared with synthetic seismograms, and the corresponding depth with the most similar waveform was found. The determination results showed that the focal depth was approximately 12 km.