Abstract: The psychological contract of construction project team members is changing in the project construction process.The construction project is divided into several milestones,as the undulation of member's dyhami8cally syschological contract is bigger in the first and the last milestones tis paper discovers pa psychological contract division spot by increasing the heavy penalty and the inspector frequency.Moreover,it further analyzes the relation between milestone goal,reward and investment ratio by using expected effectiveness and the dynamic progvamming method,and drawa some conclusion.The validity of this kind of incentive mechanism has been tested through the case.

Key words: psychological contract, construction project, team, incentive mechanism