In this paper,395 soil profiles collected from coastal region of Jiangsu at different seasons were studied,on the basis of the analysed data of 2089 samples of different horizons,dynamic regime of salts in soils were revealed as fofollows:(1) The features of sea beach soil salinization process are that the salt distributed in profile are in the shape of cylinder,"T" or "Y",with an average salt content of >0.7%;and in a state of salinization that water end salt move upward in whole year.The features of desalinization process are that the salts distributed in profiles are in the shape of pagoda,or sometimes of "T" during dry season,with an average salt content of ≤0.6%,and main dynamic regime of salts is going downwards with water.(2) It has been found there is a singnificant line between beach of meadow and that of Suaeda salsa,above which the desalinization process oceurs and below which the salinization process is going on.(3) Due to strict sequential development of eco-nvironmeat of tidal belt varying with topography and frequency of tidal intrusion,sea beach soils have significant regularity of distribution in belts.