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To protect wooden buildings from fire threat，the influence mechanism of aging on wood burning characteristics was discussed. Firstly，the combustion behavior of wood was systematically discussed in four aspects: pyrolysis，flame combustion，smoldering combustion and flame spread. Secondly，the combustion characteristics of naturally aged wood and artificially accelerated aged wood were compared and analyzed. Finally，the effects of aging on wood fire risk were analyzed based on the smoke generation characteristics of wood combustion and the flame-spreading behavior of wood structure buildings. The results show that the mechanical properties of wood are significantly reduced by changing the internal composition and carbonization degree of wood，thus weakening the fire resistance and affecting the smoke generation. At the same time，the changes in physical and chemical properties and structural characteristics of aged wood promote the fire spread of ancient wooden buildings in the initial stage of fire. However，the study on the mechanism of wood carbonization by aging is still insufficient，and the influence of aging mode and environmental conditions on the dynamic characteristics of fire at the later stage of combustion has not been clarified. To evaluate the impact of aging on the fire risk of ancient wooden buildings，it is essential to integrate material science and structural mechanics for effective fire safety measures.
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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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