How to build core competence is one of the most important issues that both theorists and managers focus on.The relationship among human resource management,core competence and performance based on studies of the hi-tech firms in China is discussed.The result discloses that learning system and incentive mechanism play an important role in the accumulation of human capital,and the latter one has a direct effect on the foster of core competence.A restriction and measurement for employees do not contribute to core competence notably,but are conductive to improving performance directly.The core competence might be acted as an modulation to the relation between human resource management and enterprise performance.