About 100 samples from surface layers of deposits located along the north Coast of Bohai Bay have been qualitatively and quantitatively analyzed,A total of 82 benthonic foraminiferal species belonging to 40 genera has been identified. They are mostly salt-brackish water and shallow water species.According to the distribution of foraminifera two foraminiferal assemblages can be distinguished. 1) The littoral assemblage living in the enviroments such as the river mouths, coastal plains, beach, lagoon etc. The representative species are Ammonia confertitesta Zheng, Elphidium hughesi foraminosum Cushman, Cribrononion porisuturalis Zheng, Pseudononionella variabilis Zheng, Quinqueloculina seminula var jugosa Cushman, Nonion akitaense Asano etc. They are called the Ammonia confertitesta and Elphidium hughesi foraminosum assemblage east of Nanbao, and the Ammonia Confertitesta and Pseudononionella variabilis assemblage west of Nanbao,2)The near coast shallow sea assemblage, the representative species are Ammonia confertitesta Zheng, Elphidium magellanicum Heron-Allen and Earland, Quinqueloculina akneriana rotunda(GeRke),Cribrononion incertum (Williamson), Elphidium advenum (Cushman), Buccella frigid (Cushman) etc. It is called the Ammonia confertitesta and Elphidium magellanicum assemblage, Difference between the two foraminiferal assemblages clearly shows that the distribution of foraminiferas was associated with water depth, salinity and different types of deposits,A section has been made which is perpendicular to the coastline and passes across Shegang barrier beach. By analysing the relationships between habitats and the amount of foraminiferal shells at each sites along the section, we can judge that the amount of foraminiferal shells is latger in the shoreline of lagoon-swamps, and smaller at barrier beach, even zero on the top of the barriers, but it increases again towords the sea.Those foraminiferal assemblages and their distributions provide an important basis for explaining foraminiferal palaeoecology in this area.