Abstract: It's important content to assess, identify and analyze dangerous location for road safety research. But until now, there is not a statistical method to identify dangerous location, which is based on a fine theoretical foundation, which is easy to use, suitable for any area. Based on the Chinese characters of road management, a statistic method for identifying dangerous location in an area or country is studied. Firstly, statistic road system is divided into four types and seriousness of accident is divided into four categories, in which indirect economic loss is included. Secondly, based on the simple Poisson distribution method, the distribution of accidents flow is determined. Lastly, according to the character of accident distribution, traffic volume, accident seriousness, economic loss and economic supporting, a nature and quantitatively determined double index is given to confirm limit values of high accident frequency and high accident rates. Dangerous location is determined by these two limit values. According to different high accident frequency and high accident rates, types of dangerous locations and their countermeasures are confirmed.