Rural areas in southwestern China have high density building environments with mostly wooden structures with many fires in recent years. A fire simulation model was developed for a typical rural design to identify potential fire risks with a visualization platform based on the OSG (open scene graph) graphics engine. Visualizations of simulation results for Wenquan village and Dukezong city agree well with the actual fire hazard. This simulation method can be used to assist fire investigations, as well as to provide a scientific basis and technical support for fire prevention planning and fire control.