The function of the distal radioulnar joint is to stabilize the rotation of the radius at the distal end of the ulna. The main stabilizing factors are: the ulnar collateral ligament, which is attached to the tip of the ulnar styloid process and ends at the pisiform bone and triangular bone; the triangular cartilage disc, which is attached to the base of the ulnar styloid process to the edge of the ulna and the radial concave; the ulnar and posterior radioulnar ligaments connected to the joint capsule; the pronator quadratus muscle; part of the surface of the distal radius and the ulna and interosseous membrane. In addition to being associated with Colles fracture, Smith fracture and Galazzi fracture, many cases of distal radioulnar joint dislocation are also single. Distal radioulnar joint dislocation is often easily missed by doctors with insufficient clinical experience. Therefore, the diagnosis of this dislocation must emphasize clinical manifestations, and bilateral contrast radiographs should be used as much as possible to discover and solve difficult problems.