Based on the new well and 3D seismic data, this paper mainly concerns the geometries and growth histories and controlling factors of the salt structures in the KL112 area of the Laizhouwan depression, offshore Bohai Bay Basin. In the Laizhouwan depression, the Sha4 Member of the Paleogene Shahejie Formation attains thick salt and gypsum which have uplifted and formed salt diapir and pillow in the KL112 area. The geometries of the salt structures in the KL112 area change from the overmaturation diapir to maturation diapir and salt pillow along the SN direction, which can indicate that the southern and northern salt structures belong to the postdiapir and salt pillow phases, respectively. Influenced by the viscous flowage and distortion of the halite, there are some saltrelated structures, including saltwithdrawal minibasins and stepped counterregional faults system, well developed in the adjacent areas surrounding the salt structures. The development of the salt structures in the KL112 area was controlled by the extensional stresses, gravitational gliding, buoyancy, differential loading and the basement structures, as well as the strikeslipping movement of the TanLu fault, in which the gravitational gliding in the background of extensional stresses was the most important factors. In addition, the strikeslipping movement of the TanLu fault should exert significance on the viscous flowage and final localization of the salt bodies in the Sha4 Member of the Shahejie Formation in the KL112 area.