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In order to improve traffic safety in the coupling area of the township fair and through-village highway，a secondary road through villages and towns in Yunnan Province was taken as the research object. The core area and the radiation area of the fair were defined according to the affordable travel distance of the township residents and the maximum trading radius of the fair. On this basis，29 risk factors in 6 dimensions of people，vehicles，roads，environment，management and accident form were selected. The risk factor identification model based on association rules was used to construct the risk factor network of highway accidents through villages and towns. By analyzing the characteristics of network topology，accident risk factors were identified. The results show that the traffic conflict in the core area of the fair is more serious，and the probability of injury accidents is 57.99 %. The core area of the township fair is the primary risk factor for accidents and plays a leading role in the spread of accident risks. The types of direct risk factors for property loss accidents and injury accidents are heterogeneous. Overall，the average clustering coefficient of driver factors is the largest，which makes it easy to produce a chain reaction. In the core area of the fair，the probability of injury accidents increases by 23.71% and 21.07%，respectively，when the driver's meeting vehicles are improper，and the driver does not give way according to the regulations.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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