Zagros forests ecosystem is the most extensive forest ecosystem in Iran, with 6 million hectares area, which expose to degradation. These forests are important in water and soil conservation and in socio-economic aspects. Kohgiluyeh-va-Boyerahmad province mountainous condition has been caused fauna and flora ecological and biological variety. The altitudinal range of 100 to 4000m above sea level and temperature variation of -10 to 45°Cindicate the vast environmental spectrum for survive of plants and animals. In addition to providing the wood needed for villagers and supplying fodder for their livestock, the available plant species is mostly important in providing secondary products including gums, resins, flowers, fruits, nuts, seeds, roots and leaves, for medicinal and industrial purposes. The present study was done through observations field to identify trees and shrubs species in province, to do it, with the aid of 1:25000 and 1:50000 topographic maps, as base maps, we’ve gone sightseeing different parts of providence. Then, by the maps and field visits, we it was attempted to specify trees and shrubs species. Samples were collected and pressed and dried by using the required equipment, and were prepared to be stored in the herbarium. Finally, the identification was done with the help of Iranian colorful flora books. The findings of the study proved the presence of 41 species from 23 families, with known useful applications, in which 16 species were trees and 25 species were shrub. 10 identified plants belonged to the Rosaceae, albeit, Rhamnaceae group of 3 species and Myrtaceae, Mimosaceae, Fabaceae, Salicaceae, Oleaceae and Ulmaceae groups of 2 tree and shrub species had the most applications in the fields of medicine and industry, among Kohgiluyeh-va-Boyerahmad's people.