After vasectomy, vasectomy reversal surgery is an option in order to have children again. At present, the microdot multilayer anastomosis method of Cornell University in the United States is more mature, utilizing the techniques of microdot marking, precise positioning, cross wiring and multilayer suture, which makes this method different from the simple microanastomosis technique and more reasonable and effective, and the rate of recanalization can reach 99.5% if there is liquid spillage at the proximal end of the anastomosis during the operation, while the cumulative fertility rate can be as high as 70% in the first year after the operation. The main advantages of this method are: precise marking of the needle point of each layer before suture, breaking down the complex anastomotic process into single orderly suture steps, reducing the difficulty of operation; the micropoint marking before suture effectively solves the difference between the lumen diameters of the proximal and distal ends of the obstruction (usually 2:1 to 3:1, or even higher), and reduces the incidence of anastomotic stenosis, leakage, and semen granuloma formation in the postoperative period. In recent years, this microsurgery has also begun to be carried out in China, and has gradually gained good results and wide recognition.