Abstract: Based on the past research about the acquirement of competitive advantage,this article analyses the relationship between the competitive advantage and three elements in the organization:Key Resources,Core competence and Organizational Learning,elaborates the different layers and mechanism of these three elements in the process of getting competitive advantage.By establishing a simple mathematical model,the article discusses the different efficiency of these three elements in establishing the competitive advantage and the relative advantage induced from core-competence owned by the organization and organizational learning.

Key words: key resources, core competence, organization Learning, competitive advantage