Phase II office building adopts the pioneering bi-directional 12.15m equidistant reinforced concrete super-big column network frame shearing force wall structure in Beijing office buildings, which eliminates columns emerging into the space of the office building adopting the regular 8.1m column network and overcomes the disadvantages for multi-function use. The "degree of freedom" of two-dimensional unit construction space has increased by 25% compared with the 8.1m column network, which provides the most reasonable office space in depth and creates the "non-material obstruction" use space to facilitate the organization and the use of the office building space.