The reference point of the contract has an important influence on the contractors ' justice perception and behavior, however, little researchers focus on the structure and content of complex contracts' justice reference point. Based on the theory of contract reference point, this paper studies: (1) Designing materials for eye movement experiment. Taking typical engineering contracts as data sources, the reading materials of eye movement experiment were synthesized by analyzing key justice elements of contract content; (2) Conducting eye movement experiment base on the contractors' contract materials and verifying the structure and content of the justice reference point in of project contracts. The results show that the justice reference point of contract is divided into two categories. The distributive justice reference point of contract is core, and the procedure justice reference point of contract is secondary. The terms of contract risk form the distributive justice reference point of contract. The contract terms of participation form procedure justice reference point of contract. The results are great significance to instruct the contractor to formulate the contract strategy and promote the contractor's positive performance after signing the contract.