The fluvo-aquic soils widely distributed in the great plain of north China are developed on the recentalluvium under the influence of seasonal fluctuation of ground-water.Owing to the variation of tezture and water regime of soil the degree of soil development is quite different,which leads the occurrence of the different patterns of land use.The present article deals with the study on the classification of basic categoriea of fluvo-aquic soils.The soil families of fluvo-aquic soils are mainly disting uished on the basis of the tezture of alluvium on which the soils are developed,and the teztural profile may reflect the characteristics of soil formation processes,the distribution and location of genetic horizons and the hydrological conditions,and these characteristics can influence the development and utilization of the soils.