本文揭示了红松原始林卫生清理后,绿色草本植物数量增加了59.1%,矮小灌木数量下降了50.95%,枯枝落叶层含量下降了24.58%。卫生清理后4年和14年,林内气温分别升高了6.0%和1.2%,相对湿度分别下降了4.26%和5.32%。这表明卫生清理后,绿色草本植物数量的增加和温度的变化使火险等级提高,而小灌木、枯枝落叶层和5种清理木的减少降低了大火和树冠火的可能性。 In this paper, the population of green herbs increased by 59.1%, the number of dwarf shrubs decreased by 50.95%, and the litter layer decreased by 24.58%. After 4 and 14 years of sanitary cleaning, the air temperature in the forest increased by 6.0% and 1.2% respectively, and the relative humidity decreased by 4.26% and 5.32% respectively. This shows that after sanitation, the increase in the number of green herbs and changes in temperature led to an increase in the level of fire danger, while the reduction of shrubs, litter layers and five types of clearing wood reduced the possibility of large fires and canopy fires.