Abstract: Based on the observation data of four marine stations along the coast of Hebei province, this paper comprehensively analyzes the sea surface temperature and salinity, reveals the regional and seasonal characteristics of sea surface temperature and salinity. sea surface temperature has an interannual variation and rising trend, which is obviously related to the temperature, reflecting its response to air-sea interaction. Sea surface salinity is mainly affected by the runoff of the Yellow River. There is an obvious negative and one-year lag correlation between the sea surface salinity of Qinhuangdao station and the Yellow River runoff.