The Bohai Strait is located between the Liaodong Peninsula and the Shandong Peninsula,with the shortest distance of about 106 km from north to south along the strait.The trans-strait passage project has been under discussion for many years.In order to investigate the thickness of Quaternary sediments and fault distribution of the proposed trans-strait passage area of the Bohai Strait,we performed a multi-channel seismic reflection exploration survey in the sea area.Based on the experiments of 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.In order to eliminate 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 a reference for subsequent geological interpretation and geological suggestions for the construction of the trans-strait passage project.