Abstract: At present, China's new energy development has made great breakthroughs, but new energy grid connection has always been an important factor hindering the leap-forward development of new energy. The problem of new energy grid connection is new energy consumption at the national level, the lack of power grid construction at the regional level, and the inconsistent management of the whole process at the project level. In order to improve the management level of the whole process of new energy grid connection, this article analyzes the problems of new energy grid connection, and sorts out the whole process of new energy grid connection mainly includes four parts: project early management, project construction, grid acceptance and operation, and collaborative guarantee system. On this basis, an evaluation index system for the whole process of grid connection has been constructed to provide a mechanism guarantee for the management of the whole process of new energy grid connection.