X-ray presentation of elbow dislocation may reveal that the normal alignment of the ulnar humerus and distal humerus of the elbow joint is lost, displaced anteriorly or posteriorly, or even displaced medially. At the same time, concomitant fractures can be found, such as ulnar humerus fracture, radial head fracture, distal humerus fracture, and fracture of the rostral process of the ulna. Elbow dislocation is a common clinical injury, mainly divided into posterior and anterior dislocation. Dislocation is usually accompanied by a clear history of trauma, as well as the combination of localized pain, dyskinesia, erythema, and swelling of the elbow joint. The elbow joint tends to be in a state of semi-extension, and the elbow joint cannot be straightened during passive movement. There is a sense of emptiness at the back of the elbow joint, a depression can be felt, and the elbow’s triangular relationship is completely disrupted and the normal triangular relationship is lost.