分析了成都市“6.5”公交车放火案的调查工作,论述了确认起火时间、起火部位、起火点和车厢地板上液体燃烧痕迹的推理分析方法以及获取关键物证、确认事件有放火嫌疑的过程;并对提高客运车辆的本质安全水平和今后的相关工作提出了建议。 This paper analyzes the investigation on the fire of a “6.5” bus in Chengdu City, discusses the reasoning and analysis methods of confirming the fire time, the fire part, the fire point and the traces of the liquid burning on the floor of the car, as well as obtaining the key evidence and confirming the suspicion of the fire Process; and to improve the intrinsic safety of passenger vehicles and future work related to the recommendations.