本文对深沪湾西部潮间带表层沉积物和两个钻孔岩芯共 3 0个样品的有孔虫组成进行了定性和定量分析 .结果表明 ,表层沉积物中有孔虫群分布规律明显 ,随着离岸向海越远 ,水深越大 ,有孔虫数量从 1位数上升到 5位数 ,种数为 9～ 69种 ,多变度V3 1～ 44,复合分异度H(s) 3 .2 5～ 3 .45.从钻孔岩芯中的全新世有孔虫群特征可看出 ,中全新世以来海面升降和海洋环境可分为 2个阶段 :(1 )海水初到钻孔位置 ,有孔虫数量和种数较少 ,分异度不高 ,海相性程度较低 .(2 )后期 (埋深 1 .8m和 2 .0m以浅 ) ,海面有所升高 ,变为潮间带 (高潮位→中潮位→低潮位 )环境 . In this paper, qualitative and quantitative analysis of the foraminiferal assemblages of the surface sediments in the intertidal zone and the two core samples in the western part of the Shenhu Bay was carried out. The results showed that the distribution of foraminifera in surface sediments was obvious , The farther the water depth is, the number of foraminifera increased from one digit to five digits with the number of species ranging from 9 to 69, the degree of variability V3 1 ~ 44, and the compound diversity H ( From the characteristics of the Holocene foraminifera in the boreholes, we can see that since the Middle Holocene the sea surface movements and the marine environment can be divided into two stages: (1) At the drilling site, the number and number of foraminifera were less, the degree of differentiation was not high, and the degree of marine facies was lower. (2) In the later period (shallow depth of 1.8m and 2.0m), the sea surface increased, Into the tidal zone (high tide → tide → low tide) environment.