Introduction：Distal ulna physis fractures are unusual but may lead to significant deformity. Most of these injuries accompany distal radial fracture. Most often, the distal ulnar injury is a type styloid injury. However, ulnar epiphyseal fracture may also occur as solitary lesions. Materials and Methods：6 adolescent cases of distal epihyseal injuries are presentation, three galeazzi’s fracture cases and three single distal ulnar epiphysis salter type II was received open reduction and k-pins fixation and casting fixation, all patient was evaluation at least two years post-operation follow up.Results：Close reduction are failure in all patient and open reduction and internal fixation are performed in all of patient, no epiphysis arrest or premature closure was occurred, no functional loss.Discussion：General concept think distal ulnar epiphyseal injury should be used closed reduction whenever possible, if the fracture is significantly displaced, open reduction may be necessary. In our series, all patients received open reduction and internal fixation with k-pin fixation. Difficult reduction by close manipulation was noted by the ulnar epiphyseal fracture had torn dorsal periosteal tissue, which was interposed in the fracture site, blocking reduction. After removal of this, both the ulnar epiphyseal fracture and the fracture of the radius reduced easily.Conclusion：Distal ulnar epiphyseal injuries are not difficulty treatment, open reduction and internal fixation is necessary by difficulty reduction and maintained the alignment. In our series, no physis arrest or functional loss, no deformity of wrist.