Knee injuries are among the most common injuries in the world population. Approximately 50% of injuries are related to sporting or recreational activities, with soft-tissue injuries accounting for the majority of knee injuries . (1) In this article we will review the imaging evaluation of knee injuries resulting from RTA, sports activities, fall ,trauma. We will review the pertinent anatomy and the imaging appearances of specific ligamentous and meniscal injuries in the preoperative setting. MRI, due to its excellent soft tissue contrast resolution and multi-planar imaging capabilities, provides significant advantages over other imaging techniques in the evaluation of traumatic conditions of knee joint.(2) MRI depicts most components of the joint, including articular cartilage, menisci, intraarticular ligaments, bone structure abnormalities.(3)