The aim of this study was to determine the mechanical properties of Acacia nilotica (L.) Willd wood and classified the grades according to basic stress. Samples of wood were collected from Damazin which located in the Blue Nile States. Wood samples were prepared to measure the static bending and compression values. The Results showed that the ultimate basic stress for bending for Acacia nilotica wood was 234.86 MPa, 102.62 MPa for ultimate compression parallel to the grain. From the results obtained during this study, Acacia nilotica wood has higher average of bending stress and Compression stress and this property is recommend for using it for heavy construction, flooring, furniture, veneer, plywood, tool handles and railway sleeper production.