Base on testing results of top-soils and deep-soils,distribution characteristics of organic carbon(abbrev org.C) in soils were discussed by types of soils,elevations,degrees of slope,and vegetation covering.It can be concluded that soils in the Three Gorge Reservoir District belong to mineral soils,because of lower soil org.C.Under the same natural condition of pedogenesis,Parent rocks play an important role in distribution of org.C in soils.In the limestone area the soils are abundant in org.C.on the other hand,in the sandstone and mudstone districts the contents of org.C in the soils are lower.In terms of the degree of slope,the contents of org.C in the purple soils increase with the decline of the degree of slope.When the elevation decreases,the contents of org.C in the purple soils decline,too.When the parents rocks,climate and topography are similar,the contents of org.C in purple soils are determined partially by the type of vegetational cover.Soils in the tussock and broadleaf hurst areas contain more org.C relatively,than soils in the mixing forest,shrubbery and conifer forest areas.