Detailed interpretation of morphology and shallow stratigraphic structure were carried out base on high-resolution multi-beam water depth data and single-channel seismic profiles. Three canyons and four channels were recognized in the study area. The result indicates that slumping was well developed in the sequence U2 in the canyons area, which has close relationship with the occurrence of gas hydrate. The canyons or channels were initially formed by the decomposition of gas hydrate and further developed under the control of NW trend faults and the erosion of bottom current. The canyons and channels were formed in Quaternary according to its shape and stratigraphic position.