The network of large-scale complex project is not a simple superposition of subnetworks, but a hierarchical spatial structure. Based on the theory and method of complex network, this paper constructs the triple model of the network of large-scale complex project, defines the link operation and contract operation of the spatial network, then investigate the relative coefficient, the critical index of sub project, the critical index of activity and the solution algorithm. Based on these results we can analyze the features of large-scale complex project from the project level, subproject level and activity level and put forward targeted management strategies. The case study suggests that the spatial structure and network operation can precisely describe the structure of large-scale complex project, and by analyzing the features of spatial structure we can propose effective project management strategy.