利用１９８１—１９９０年的实测水文资料分析了象山港与混合密切相关的盐度分布和环流结构，并对盐度锋面出现成因进行了探讨。研究结果表明，象山港盐度受长江冲淡水活动影响较大，冬、夏口门附近盐度分别为２４—２５左右和３１以上，湾顶附近盐度季节变化不大。冬季湾内盐度空间梯度较小。夏季湾内有两个盐度锋面出现，水体垂向略有层化但并无明显的跃层出现。此外，象山港狭湾内以重力环流为主，狭湾外以水平环流为主。 Based on the measured hydrological data from 1981 to 1990, the salinity distribution and circulation structure closely related to mixing in Xiangshan Harbor were analyzed. The causes of the salinity front were also discussed. The results show that the salinity of Xiangshan Port is greatly influenced by the fresh water activity in the Yangtze River. The salinity around the winter and summer mouths is about 24-25 and 31, respectively. The salinity change around the bay top has little change in the seasons. Winter Bay salinity gradient is small. There are two salinity frontal appearances in the summer bay, and the water bodies are slightly stratified in the vertical direction but no obvious thermocline appears. In addition, the Xiangshan Port is dominated by gravity circulation and the horizontal circulation is the main part of the narrow bay.