Abstract: The Bohai Strait is located between the Liaodong Peninsula and the Shandong Peninsula, with the shortest distance from north to south of about 106 km. The Bohai Strait trans-strait passage project has been under discussion for many years. In order to investigate the thickness of Quaternary sediment and fault distribution of the proposed trans-strait passage area of the Bohai Strait, multi-channel seismic reflection exploration was carried out in the sea area. Based on the experiments comparing different source of energy, such as 1000 J, 2000 J, 3000 J, 4000 J and 5000 J, the field acquisition parameters were determined. The multi-channel seismic acquisition system includes an electrical sparker with a maximum energy is 5 000 J, and a 24 channel seismic streamer with a group interval of 3.125 m. Focus on eliminating noise and multiples, a set of seismic data processing methods suitable for the study area was determined, and a high-resolution seismic profile was obtained with a resolution better than 1.0 m. This data can provide reference for subsequent geological interpretation and geological suggestions for the construction of the trans-strait passage project.