Contents and distributions of nutrients (total N, total P, total K and OM) and organic carbon of different forms (ready-to-oxidize and hard-to-oxidize) in water-stable aggregates (>0.25 mm) in ultisols different in erosion degree (slight, medium and severe) were studied. Results show that with erosion aggravating, the contents of nutrients (OM, total N and total P) in water-stable aggregates (>0.25 mm) gradually decreased. In terms of contribution to the total of soil nutrients, various fractions of water-stable aggregated a sequence of [>4 mm] > [0.5～1 mm] > [1～2 mm] > [2～4 mm] > [0.25～0.5 mm]. The contents of total N, total P and OM were significantly and positively related to the content of >0.25 mm water-stable aggregates. The contents of soil total organic carbon, readily-oxidation and hard-oxidation organic carbon took on a falling trend with the enhancing of erosion degree and had the marked positive correlation with >0.25 mm water-stable aggregates, OM, total N and total P, while oxidation stability coefficient of organic matter was negatively related to the contents of water-stable aggregates of various fractions, OM, total N and total P.