One of the most important forest trees in the south of Kerman, which plays an important role in the region's ecosystem and beekeeping industry and is infected by wood-eating beetles, is Prosopis cineraria. These trees are an important habitat for various animals and refreshing the hot air of the south. In the sampling conducted during 1401-1400 from the mesquite forests of southern Kerman (Ghaleganj, Faryab, Anbarabad), the wood-eating beetle Xylopertha reflexicauda (Bostrichidae) was collected for the first time from Prosopis cineraria trees and is identified. The species of wood-eating beetle was identified by reliable scientific sources and was finally confirmed by Mr. Dr. Len Yu Liu. This species was first identified and described by Lesne in 1937. Due to the lack of water and recent droughts and the weakness of Iranian mesquite trees, the larvae of this beetle are active inside the trunk and bark of mesquite trees and feed on the wood and bark of tree trunks and cause great DAMAGE to Prosopis cineraria trees.