Abstract: Summarize the project practice and demand about the power supply and distribution system of fire load in building. This article mainly discussed the following contents: the classification of different buildings, the load classification and power supply and distribution programme; the arrangement of transformer and switch station and the demand for fire facilities; the protection configuration for fire distribution line; the selection, laying and plugging of fire cables in explosion sites. This article systematically summarized and explained the standards about the power supply and distribution system for fire load.