Based on the spot investigation,consulting document and interviewing,the species,quantities,ages,protection grades,growth potential,floristic characteristics,protection conditions,current problems of the ancient or rare trees were studied in Yuping Dong Autonomous County. The result showed that there were up to 485 ancient or rare trees in Yuping Dong Autonomous County,which belong to 23 families,30 genera,34 species. There are 32 trees over 500 years,38 trees between 300 years and 499 years,415 trees between 100 years and 299 years.There was significant correlation with the altitude,slope and the number of ancient or rare trees,there were many differences among them. The floristic characteristics of the ancient or rare trees were also analyzed,the result showed that the temperate distribution-type had a significant dominance,and the tropic distribution-type played a secondary role in the floristic characteristics. There are lots of problems in the protection of ancient or rare trees,such as the shortage of funds,low maintenance level,etc. Therefore,some effective countermeasures should be adopted,including widen financing channel,developing professional contingent,constructing Ancient Trees Park,etc.