After 1985 when Yushan National park was established, it had a great utility in protecting the natural resources of Central Mountains main area, because of the restriction of general populace activity and work was comparatively tight and severe in protection area of the park, Yushan National park became a best place for wild animals and vegetations growth and succession naturally. The forest ecology will often be destroyed by the artificial factor such as cultivating , grazing , lumbering, etc, or receive the interfering of natural factor , such as fire , typhoon , landslide , cold hurting , etc. The forest fire will cause a large number of losses and destroy the function of the forest ,influence the composition of ecosystem, even destroy the whole ecosystem. After the fire happened in Heilongjiange and Yellowstone, the impact to the environment of forest fire is very important. In the main forest ecology of Taiwan, it is apt to fire have: Taiwan Red Pine, Screw-pine shrub savanna , tropical monsoon forest , alpine grassland and Taiwan Acacia forest etc. ; Taiwan Red Pine is the mainly distributed in 700-3200 m (a.s.l.). the branch and leaf of Taiwan Red Pine is rich in the rosin to make it increase flammables, a large number of withered branch and leaf layer accumulated will increase the possibility of the forest fire. (Lu et al., 1986; Chen et al., 1986, 1987; Liang, 1988). In Tatachia area, the greatest forest fire had happen in the Yushan national park in 1994, the range is nearly up to 300 hectares, so far already 12 year. Besides Chen et al., (1994) and Yang (1996) have done the vegetation and ecology investigation in early period, up till now not vegetation of follow-up investigation and analysis that is performed and taken the place of to this area yet, so, this plan research the succession of vegetation to contrast the vegetation structure before fire and might state where fuel accumulated. And study on the vegetation of woody plant of its ecophysiological characteristic.