本文分别对位于台湾海峡中部和北部两个连续观测站１９９８年２～３月的ＣＴＤ资料进行分析，认为北部测站在观测期间经历了低温、低盐水入侵的过程，但此过程只显著影响到３０ｍ层，温盐垂直结构有时出现单跃层，有时出现阶梯结构；而中部测站盐度垂直均匀，温度垂直梯度也较小，已不受闽浙沿岸水的影响。 In this paper, the CTD data of two consecutive stations in the central and northern Taiwan Strait from February to March 1998 are analyzed respectively. It is concluded that the northern station underwent the process of low temperature and low salt water intrusion during the observation period, but this process only affected significantly In the 30m layer, the vertical structure of temperature and salinity sometimes appears as a single layer and sometimes as a ladder structure. However, the salinity of the central station is vertically uniform and the vertical gradient of temperature is also small, and it is not affected by water along the coasts of Fujian and Zhejiang.