Abstract: 【Objective】 Based on the collection of literature data and field survey,the author identified and arranged the plant samples with a natural succession after 2015 a forest fires distributed in the northern slope of Dieshan Mountain.【Method】 ’A list of the plant on the northeastern margin of Qinghai-Tibetan’ as the basis for the floristics analysis.【Result】 There are 29 families,53 genera and 68 species. The families of natural plants are mainly cosmopolitan,accounting for 51. 72% of the total number of families. Compared with word flora,the dominant genera have small number of species,and belong to cold temperate zone,mainly distribute the north temperate zone and high mountain area. On the level of genera,the flora belongs to the nature of temperate zone that mainly with the north temperate elements,especially dominated with the typical elements from the warm and cold zone of Europe and Asia continents,and also with warm,cold warm and alpine ones. The flora is a young,most of the plants are perennial herbs and the poorest on trees,short of the ancient type and primitive species. It is the area of the margin of the Qinghai-Tibetan Plateau and the transition flora,far from the hinterland of the Qinghai-Tibetan Plateau,while the flora has been influenced by both alpine one of southwest China and other one of north China. It keeps the floristic nature of plateau and alpine. It is one of the representative floras of the transition zone between the Qinghai-Tibetan Plateau and the Loess Plateau of China.【Conclusion】 From the analysis of this study,it is undeniable that the flora of the burned area of Abies fargesii forest on the northeastern margin of Qinghai-Tibet belongs to the Qinghai-Tibet Plateau subdivision,Tao river-Min Mountain subregion.