Abstract:  Based on repeated game theory, this paper proposes a conceptual model to explain the mechanism of contractor hierarchical management thrugh literature analysis and deductive reasoning , supportedby specific case studies. The research shows that contractor hierarchical management is a method of rela-tional govemanee. This form of governanee provides high-quality contractors with the expectation of con-tinued future cooperation through relational commitment , facilitating the establishment of long-term, sta-ble cooperative relationships with high-quality contractors. This, in tum, imprves project cooperationperformance and maxvimizes the interests of the owner. This study provides a theoretical foundation for thepromotion of the contractor hierarchical management model.

Key words: contractor hierarchical management, repeated game theory , prject cooperation performance, mechanism of action