As public areas, because of its large fire load, personnel-intensive, and flow of people,the safety of the Larege-scale Commercial Area(LCA) is closely related to deaths and injuries of people and the serious loss of the property.

Based on the design of extinguishing system of Beijing Shimao Building,the paper brings out some views and solutions to the outdoor extinguishing water system of super large scale commercial buildings and problems of application of super fire-resistant roller shutter in the separation of fire-resistant divisions,which may be used for reference for the relative design.