“Minimally invasive” is an important development trend of modern cardiac surgery, and thoracoscopic cardiac surgery is considered another important technical revolution in the field of cardiac surgery since the introduction of extracorporeal circulation, representing one of the important development directions of minimally invasive cardiac surgery; it has also changed the traditional concept of cardiac surgery, and heart valve surgery has been able to be done in a fully It has also changed the traditional concept of cardiac surgery, and heart valve surgery can be done under full thoracoscopy. In the past two years, the Department of Cardiac Surgery has successfully completed 50 cases of thoracoscopic heart valve replacement/plasty surgery, marking a new level of minimally invasive cardiac surgery in our hospital. The scope of the surgery includes total thoracoscopic mitral valve replacement + radiofrequency ablation of atrial fibrillation, total thoracoscopic mitral valve replacement + left atrial thrombus removal left auricular suture closure + tricuspid valvuloplasty, total thoracoscopic mitral valvuloplasty + atrial septal defect repair + tricuspid valvuloplasty, total thoracoscopic radiofrequency ablation of atrial fibrillation + mitral valve replacement + left atrial thrombus removal left auricular suture closure + tricuspid valvuloplasty; total thoracoscopic atrial fibrillation radiofrequency ablation + mitral valve replacement + left atrial thrombus removal left auricular suture closure + tricuspid valvuloplasty The procedure was performed to repair partial endocardial cushion defects under total thoracoscopy. Recently, aortic valve replacement surgery was completed with the assistance of thoracoscopy. These 50 patients came from Gansu, Qinghai, Ningxia and Anhui. Most of them have rheumatic heart disease, mainly mitral stenosis with incomplete closure, a few have combined aortic valve and tricuspid valve lesions, and some patients have mitral valve incomplete closure due to cardiac connective tissue degeneration. For rheumatic heart disease, mitral valve stenosis is the main cause, and mitral valve replacement surgery should be performed in most cases; for lesions caused by connective tissue degeneration with mitral valve incompetence, mitral valvuloplasty can be performed in most cases. 50 patients were discharged from the hospital after total thoracoscopic heart valve surgery, and all indicators achieved the same results as open heart surgery without any complications. The cost of treatment and hospital stay were also less than that of traditional open-heart surgery. The incision is reduced to the level of 3 small holes in the chest wall, and the patient suffers only from a 1.5 to 2.5 cm long “flesh wound”. Without sawing through the sternum, the integrity of the thorax is maintained and the bleeding and pain of the incision after traditional open-heart surgery is greatly reduced, minimizing surgical trauma to the greatest extent possible based on current technology. The routine development of all-thoracoscopic heart valve replacement and shaping surgery indicates that LANU-II is at the forefront of minimally invasive cardiac surgery in the province and has stepped into the national advanced ranks. In this way, the assistance of thoracoscopy allows the surgeon to extend the field of vision, avoiding the large incision of traditional open-heart surgery and the traditional splitting of the sternum. It significantly reduces trauma, bleeding and blood transfusion, and hospitalization time, enabling patients to achieve early recovery.