The hip joint is a pestle and mortar joint, fixed by muscle tissue, with poor joint inclusion but good stability, and only stronger violent injuries can lead to acute dislocation. Hip dislocation includes anterior dislocation and posterior dislocation. The incidence of anterior hip dislocation is 1/6 of that of posterior dislocation. posterior hip dislocation refers to the dislocation of the femoral head from the posterior aspect of the acetabulum, which is mainly caused by direct violent injury, such as a car accident during driving, the hip joint is flexed, the knee joint is hit by a large force, and the femoral head is dislodged from the weak point of the posterior edge of the hip joint, which can lead to fracture of the posterior aspect of the acetabulum and dislocation of the femoral head if the injury is serious.