Abstract: The ocean-bottom seismometers (OBS), a tool extensively utilized in marine geophysical exploration, hold indispensable significance for studies on the Earth's crustal structure, submarine landslide monitoring, and resource exploration. Upon OBS deployment on the ocean's surface, its final landing position typically deviates significantly from the predetermined position due to the influence of various factors. This positional deviation will severely undermine the accuracy of subsequent seismic imaging or inversion. Consequently, the OBS repositioning is necessary during data processing. This study reviewed the primary methods for OBS repositioning and applied them to the OBS data acquired in the Shenhu area, the South China Sea. Prior to data acquisition, the circuit of the data acquisition board was modified, including clock skew correction, achieving timestamp synchronization across the entire acquisition system. Building upon these enhancements, repositioning was successfully performed using the time-slice method. The repositioning results consistently satisfy the rigorous research requirements, while inverted equivalent water velocity and depth parameters demonstrate closer alignment with depth-domain imaging results derived from towed-streamer seismic surveys.