At present, our Thoracic Surgery Department has completed several cases of enlarged thoracoscopic thymectomy, which has benefited patients with myasthenia gravis combined with thymoma, or thymic hyperplasia or poor degeneration. Relying on the research team for the treatment of myasthenia gravis under Director Li Haifeng of the Department of Neurology, the Department of Thoracic Surgery of our hospital has vigorously promoted the development of minimally invasive thymic surgery, which has greatly reduced the pain of patients, shortened the average hospital stay, and made the perioperative period less risky while ensuring the surgical results, bringing benefits to patients. Thymoma accounts for approximately 20% of adult mediastinal tumors and is usually slow-growing, with no difference in incidence between men and women. Thymoma has an idiosyncratic presentation: a combination of multiple paraneoplastic syndromes, of which myasthenia gravis is one of the most common. Studies have found that 15% of myasthenia gravis have thymoma and 55% have combined thymic hyperplasia or hypoplasia. Traditional surgical approaches include transverse neck incision and median sternal splitting incision, which are both more traumatic and have longer surgical scars, affecting the aesthetics. The expanded thoracoscopic thymectomy can achieve the same complete removal of thymic tissue and contouring of the anterior mediastinal fat as the traditional approach through the lateral chest wall intercostal approach, with less trauma and aesthetic appearance, and the patient recovers quickly after the operation. The patient’s muscle weakness symptoms were relieved to varying degrees from postoperative day 2-14.