The power grid has extremely rich data resources, and the power grid itself has the distribution characteristics of natural geographical spatial. The expression of the grid spatial information, and the deep integration with its business data assets and the visual presentation have been an important subject of the large grid data and in the construction of the intelligent electric grid. The power of 3D GIS technology, characterized by spatial information expression and heterogeneous multi-source data fusion, can effectively assist the construction 、management and macro decision-making of power grid system. This paper which aims at sorting out the grid data assets of Southwest and researching the visual display applications, has discussed the design and implementation process of the grid data assets visualization system based on 3D GIS platform. And on this basis, this paper analyses and discusses the application scenarios of the 3D visualization system of the grid data assets in the areas of digital engineering, planning and construction, operation maintenance, emergency deployment.