HD underground water-sealed cavern is China’s first large underground water-sealed oil storage cavern. In consideration of its construction characteristics,a construction mode involving integrated innovation,E(Engineering)+P(Procurement)+C(Construction)+Supervisor,and technical monitoring by a third-party is proposed. The framework of technology integration,knowledge integration,and organization integration is established,and the assessment system for integrated innovation is given. For the construction management of HD project,the proprietor,investigation,designing,construction,supervision and monitoring are integrated; the integrated innovation is further decomposed into three levels proprietor,supervision and construction; and the HSE control,quality control,schedule control,investment control,as well as contract control are implemented rigidly. Two years of practice at HD project shows that the implementation of integrated innovation has achieved excellent result.