The elbow joint is the most important joint of the upper limb and is often traumatized. Elbow fracture dislocation is a common trauma of the upper limb, and there is a kind of elbow fracture combined with dislocation, which is often missed or misdiagnosed and seriously affects the function, and we would like to introduce it with the case below. Zhou Hammer, Department of Hand and Microsurgery, Peking University Shenzhen Hospital The triad of elbow joint terror is the abbreviation of the combined injury of elbow dislocation, ulnar coronoid fracture, and radial tuberosity fracture, which has a special performance and more complicated treatment. This injury was first reported by Josephson in 2002. Recently, it has received increasing attention from upper extremity surgeons and hand surgeons in China. The following figure shows the mechanism of injury peri-radial ligament peri-ulnar ligament peri-ulnar ligament ulnar coronoid elbow joint surgical approach preoperative CT + 3D reconstruction is required to examine the ulnar coronoid fracture is divided into three categories type 1 type 2 type 3 type 2 or more requires surgery internal fixation intraoperative coronoid fracture seen intraoperatively radial tuberosity fracture seen intraoperatively radial tuberosity fracture the following figure shows the radial tuberosity comminuted fracture requires radial tuberosity replacement postoperative external fixation brace fixation intraoperative fluoroscopic ligament injury causing medial External instability also requires ligament reconstruction for good functional recovery after surgery This type of injury is serious and treatment needs to be standardized, so it is recommended to see a professional doctor.