The application of lean construction theory in building green substation was discussed. The study on integration of design-build indicated that the electric power design institute as the general contractor should change the mode of only setting up one secondary organization to manage the engineering, and should improve the management system and change the producing idea. The study on the combination of the last planner system and building the substation indicated that the measures of arranging the work and setting the workload reasonably and enhancing the supply of important resources etc. could increase the Percent Plan Complete of building the substation. At last, the 4-saving and 1-environmental protection measures of green construction of substation were brought out.