Pinus sylvestris var. Mongolica is a tree with a height of 25 meters and a DBH of 80 cm. the bark of the tree is thick, the lower part of the trunk is grayish brown or dark brown, and it is deeply split into irregular scales and falls off. the upper bark and branch bark are yellow to brownish yellow, and the inside is golden yellow, which is split into thin slices and falls off. Branches spread obliquely or horizontally, and the crown of young trees is spire-shaped, while that of old trees is dome or flat-topped, and the crown is sparse; the annual branches are yellowish brown and hairless, and grow grayish brown in two or three years; Winter buds are brown or fawn-brown, oblong and resinous.