Hernia is a common surgical condition. Generally known as extra-abdominal hernia in medical terms, its types include inguinal hernia, incisional hernia, umbilical hernia and femoral hernia. And among them, inguinal hernia is the most common extra-abdominal hernia, which is categorized into hiatal hernia, straight hernia and femoral hernia. It is characterized by a painless or distended lump in the left or right inguinal area, which is more obvious when standing upright and shrinks or disappears when lying down. In essence, the abdominal organs protrude from the weak defect area of the abdominal wall, resulting in the formation of a reproducible mass. The disease can develop at any age, and is more common in men than in women, and in the elderly than in the young. There are both congenital and acquired factors in the formation of inguinal hernia. In young patients, most of them are caused by congenital factors, such as the testicles descending to the scrotum during fetal life. If the duct is not completely atretic, the organs in the abdominal cavity may protrude through the inguinal canal when they grow up and form a hernia. There are also causes such as congenital defects localized in the abdominal wall. Elderly patients in addition to congenital factors, acquired factors are the main cause of its development, such as muscle atrophy, muscle tissue relaxation, or due to constipation, prostate hypertrophy so that large, urinary incontinence caused by increased intra-abdominal pressure. Newly occurred inguinal hernia, because the discomfort symptoms are not obvious, most patients often do not pay attention to, that do not need treatment. In fact, this is quite a wrong point of view, the reason is: new inguinal hernia if not treated in time, the original abdominal wall defect will become bigger and bigger, resulting in difficulties in treatment, in addition, the recurrence rate after treatment is also increased. As the hernia increases in size, the symptoms of distension and discomfort become more pronounced, affecting the quality of life. In serious cases, there is also a mass that can be returned to the body can not be pushed back, accompanied by abdominal cramps, vomiting, abdominal distension, which indicates that the protruding intestinal cavity or other intra-abdominal organs by the hernia ring stuck, no longer be able to return to the abdominal cavity, medically referred to as a hernia incarcerated, a situation which is very likely to lead to the intestinal cavity or other intra-abdominal organs ischemia, necrosis, such as timely surgery will be a life-threatening situation. With the exception of a few hernias in young children, all hernias require surgery. The purpose of surgery is to repair and strengthen the defects and weaknesses in the abdominal wall so that the abdominal organs no longer protrude. There are many ways to repair hernia, the earliest classic hernia repair, the method is to the defect on both sides of the tissue forced suture, high tension, the patient feels postoperative wound longer pulling discomfort, and recurrence rate is high, up to 10% ~ 30%. Therefore, it is gradually replaced by the open artificial mesh filling tension-free hernia repair, which greatly reduces the recurrence rate. In recent years, with the improvement of medical devices and surgical techniques, laparoscopic surgery has made significant progress, and laparoscopic hernia repair, like other laparoscopic surgeries, has seen tremendous development. The human abdominal wall is divided into several layers, the innermost layer is called the peritoneum. If the surgery can achieve its therapeutic goal without entering the abdominal cavity, the impact on the person can be much minimized. Laparoscopic Total Extraperitoneal Patch (TEP for short) can do just that, requiring only two 5 mm and one 10 mm wounds, without entering the abdominal cavity, but completely outside the peritoneum, where the hernia bag is pulled back into the abdominal cavity according to endoscopic TV images and the hernia protruding notch is covered with artificial mesh. The advantages of this method are as follows: firstly, because it is performed completely outside the peritoneum, it does not touch the abdominal organs and does not produce abdominal adhesions; secondly, because the artificial mesh is applied at the weakest point, the artificial mesh does not need to be sutured, and it can be quickly fused with the abdominal wall tissue to form a joint with extremely high tensile strength; because the patch that is inserted is 10X15 cm in size, it can cover hiatal, rectal, and femoral hernia at the same time. The recurrence rate is low, usually around 1%, and can be further reduced to 0.1% by surgeons with extensive experience in laparoscopic surgery. Due to the smaller wound, the postoperative pain is mild, the discomfort reaction is small, the recovery is fast, the chance of wound infection is small, you can go home for daily life on the second day after the operation, and you can return to work 1 to 2 weeks after the operation. In addition, laparoscopic total extraperitoneal repair is most suitable for bilateral inguinal hernia and recurrent hernia. Due to the advantages of less trauma, quicker recovery and lower recurrence, and the treatment cost is comparable to that of open synthetic mesh repair, this surgical procedure has been accepted by more and more patients. However, total extraperitoneal hernia repair has a certain degree of technical difficulty, which requires a surgeon who has rich experience in laparoscopic surgery to perform this procedure.