As an important symbol of modernization, subway has huge impact to the development of city and society from prosperity and stability aspects. However, because of its complex structure, few entrances and exits, long evacuation routes, densely populated, and other factors, there is high risk of fire hazards in subway station. Therefore, it is important to study the linkage mechanism of fire evacuation and rescue. Taking Chaoyang Guang as an example, this paper expounds the overall layout of the fire evacuation and rescue linkage mechanism of the subway, analyzes the emergency management system of the subway based on BIM platform, and forms the evaluation system of the emergency plan by using AHP (Analytic Hierarchy Process). The results show that the application of BIM+AHP has practical significance for the improvement of the linkage mechanism of fire evacuation and rescue in Metro, and it can achieve the informatization and scientization of fire rescue.