The life cycle integration management of the large-scale public utility construction projects refers to the process integration of every stage of the project from decisions, planning, design, implementation, operation, maintenance to the end. In this paper, in order to realize the full life-cycle target system, we studied the whole process integration management and the interrelation of different assignments in different phases. The full life-cycle process integration model of large-scale public utility construction projects was proposed. And on this basis we discussed the support conditions of full life-cycle process integration of large-scale public utility construction projects so that the project can achieve balance and harmony in the whole life cycle as well as the investment benefit and social service function can be further improved.