The invention discloses a reinforced soil bank wall structure suitable for beach zone soft soil foundation conditions, namely a reinforced soil bank wall structure based on a beach soft foundation. The reinforced soil bank wall structure comprises plastic drainage plates arranged in soft soil, drainage under layers paved on the surface of the soft soil, a bagged sand quilt cofferdam, prefabricated wall panels used for protection and soil blocking, reinforced belts previously buried in the bagged sand quilt cofferdam, a filling material between the wall panels and the bagged sand quilt cofferdam, pile foundations below the panels, copestone above the panels and reverse filtering geotextile behind the bagged sand quilt cofferdam. The structure is implemented step by step, and the deformation of the soft soil foundation and the cofferdam is basically finished before the wall panels are constructed, so that post-construction settlement and uneven settlement are reduced. The bagged sand quilt cofferdam can also be used as the construction platform of the wall panels and the pile foundations, so that intertidal zone construction is changed into land construction, and construction conditions are improved. The structure can adapt to the bearing capacity and deformation of the soft soil foundation, is simple in construction technology, can be constructed by stages, and saves investment.