Depending on the severity of left shoulder supraspinatus tendon injury, conservative treatment or surgery can be adopted. 1. Conservative treatment: if the patient’s symptoms are relatively mild, conservative treatment can be taken, which can be carried out on the affected side of the limb flexion 90 ° suspension in the chest braking, so as to create conditions for the recovery of the injured supraspinatus tendon. At the same time, attention to rest and oral anti-inflammatory drugs, such as ibuprofen, naproxen, etc., when the symptoms are relieved, early functional exercises can be carried out. 2. Surgical treatment: If the supraspinatus tendon injury is more serious, surgical treatment should be carried out. The treatment needs to be operated under minimally invasive arthroscopic surgery, and the ruptured tendon will be sutured and repaired by placing rivets to restore the function of shoulder joint. If the patient’s left shoulder supraspinatus tendon injury symptoms are serious, or the symptoms persist without improvement, he should go to the hospital in time for treatment, do not blindly use medication.