Abstract: In this paper, we introduce the definition of n-star subcategories, which is a generalization of n-star modules and n-C-star modules. We give some characterizations of n-star subcategories, and prove that M is an n-P-tilting subcategory with respect to cotorsion triple (P, R-Mod, I), if and only if M is an n-star subcategory with I ⊆Presⁿ(M), where P denotes the subcategory of projective left R-modules and I denotes the subcategory of injective left R-modules.

Key words: n-Quasi-projective subcategories, n-P-Tilting subcategories, n-Star subcategories, Cotorsion triple