Tubal recanalization can be performed after ligation. Tubal recanalization is infertility caused by tubal factors, and the surgical purpose of pregnancy can be achieved through repair surgery. Not only to make the lumen unobstructed, but also to consider the functional state of organs. Therefore, the choice of preoperative cases, the precision of surgical techniques and the careful treatment after operation are all factors that determine the success or failure of the operation. The recanalization includes tubal ligation and tubal obstructive infertility. The effect of recanalization after tubal ligation is different according to the original ligation method. The original ligation method used isthmus pericardium drainage or double-fold ligation, and the ligation site was in the middle of fallopian tube 1/3, which was convenient for anastomosis. Due to the progress of microsurgery technology, the success rate of surgery has improved. A large number of clinical data reported that the success rate of microsurgical tubal anastomosis after sterilization was over 90%. To perform fallopian tube recanalization under microscope, the operator and assistant should first carry out basic skills training, be familiar with the structure, performance and usage of the surgical microscope, train the unity of eye and hand movements, and the tacit cooperation between the operator and assistant is also the key to successful operation. The operation of anastomosis is simple, and the success rate and pregnancy rate after operation are much higher than those of ostomy and transplantation. Of course, in some cases, too much tube core removal or the diameter of the broken end is very different, which will affect the effect of the operation.