Infertility caused by tubal obstruction accounts for 25-50% of female infertility, some of which can be unblocked after anti-inflammatory treatment or fluid and gas ventilation due to inflammatory adhesions, and some of which can be unblocked by open or laparoscopic surgery, and with the development of radiological intervention, tubal recanalization by catheterization has been successful. Interventional treatment can be performed by introducing a guidewire directly into the fallopian tube lumen under an X-ray television screen using a coaxial catheter system to loosen the adhesions by mechanical action and achieve the purpose of unblocking. The obstruction can be detected directly under X-ray and imaging, and the guidewire can be placed accurately and can be performed several times. Due to the continuous improvement of operation techniques and instruments and the prevention of postoperative reobstruction, it has been accepted by many patients and is widely used in clinical practice. Interventional techniques for tubal obstruction: Infertility caused by tubal obstruction is mostly due to tubal inflammation, tubal distortion, inflammatory debris in the lumen! Congestion and edema! Adhesions or thick mucus, tiny fibrous filaments can cause tubal obstruction, in addition, inflammation, hydrocele, tuberculosis can also cause tubal lining destruction and cause adhesions and obstruction. Therefore, the therapeutic significance of the interventional treatment, which is to loosen the adhesions by delivering a guidewire into the fallopian tubes under X-ray guidance, has been reported at home and abroad. Compared with surgical treatment, it has the advantages of being less invasive, simple, safe and economical, and can be performed several times with little pain to the patient. Recanalization rate: The recanalization rate of tubal obstruction in interventional treatment reported abroad is between 58-98%, which is higher than the recanalization rate of microsurgery, and 90-98% reported in China. Reproduction rate: The reproduction rate of interventional tubal obstruction reported in foreign countries is 29-47%, while that in China is 25-35%, which is similar to that of microsurgery. With the application of new techniques and methods of intra-tubal ozone injection combined with salvia injection, the patency rate after tubal recanalization has been significantly improved, thus further increasing the conception rate of patients with this type of infertility. Since the successful launch of tubal ultra-selective recanalization in 2006, the interventional department of our hospital has successfully performed more than 100 cases of obstructed tubal recanalization interventions for infertility patients, and the rate of obstructed tubal recanalization has reached over 90%, thus fulfilling the dream of motherhood for many infertility women.