Slap (superior labrum anterior and posterior) injury is a front-to-back injury of the superior labrum, often involving the attachment zone of the long head of the biceps tendon, located in the 10 o’clock to 12 o’clock area, the cause of injury 1, athletes who have done head movement for a long time 2, shoulder joint impingement injury 3, strain injury Typology (1990) Snyder) four types, 1, upper glenoid labrum is worn and degenerated but the upper glenoid labrum is still tightly attached to the superior border of the shoulder glenoid with the biceps tendon attachment intact 2, upper glenoid labrum and biceps tendon attachment area torn and separated from the shoulder glenoid 3, upper glenoid labrum barrel stem-like tear torn with the biceps tendon attachment area intact 4, upper glenoid labrum barrel stem-like tear and tear involving the long head of the biceps tendon Clinical manifestations: shoulder pain, especially when the affected limb is in abduction It is obvious when the affected limb is in the abduction position, and there may be symptoms such as joint don’t feel stuck, strangulation, popping, activity limitation, weakness, etc. Biceps tension test (Speed test) 2, squeeze rotation test 3, dynamic squeeze test 4, reset test 5, supine position resistance flexion test, there are many examination methods, so no one examination is perfect. Auxiliary examinations: 1, X-ray findings without abnormal findings, occasional supraglenoid nodal fractures 2, CT examination: if combined with shoulder instability, glenoid bone defects can be found, 3, MRI intra-articular contrast spillage examination is more meaningful. My experience is that intraoperative findings are more important and preoperative preparation is more important and I would have small rivets on standby in order to manage this injury. It is possible that the lack of preoperative arthrography is relevant.