Tennis elbow is a common disease. The current research showed that the basic pathology of tennis elbow is not inflammation, but lateral elbow tendinopathy. Ultrasound image has been frequently used for diagnosis of tennis elbow, it can evaluate the condition of disease and show prognosis. Tennis elbow needs a comprehensive treatment. Most patients can obtain satisfactory effects by non-operation, especially the application of the Sodium hyaluronate, autologous blood and botulinum toxin. The principle of operation is to clear the common extensor tendon and repair or rebuild the tendon dead centre if necessarily. The arthroscopic surgery has the advantages of less invasion, rapid recovery,and become the new chioce for the treatment of tennis elbow. Both open operation and arthroscopic surgery can obtain good effects.