Tubal obstruction is an important cause of female infertility, accounting for about 30%-50% of female infertility. Conventional hysterosalpingography has a low rate of displaying the fallopian tubes due to insufficient pressure of the contrast agent in the uterine cavity, spasm of the fallopian tubes caused by various reasons and false obstruction of the near segment of the tubes caused by tissue debris and mucus plugs, and the diagnostic rate of lesions decreases, with a false positive rate of 6%-24% and a false negative rate of 8%-24% reported in the literature. Trans-cervical selective tubal angiography is performed by inserting a catheter directly into the opening of the fallopian tube through the cervix and injecting contrast directly to improve the diagnostic effect, and can be performed by using hydrostatic pressure to act directly on the fallopian tube to treat certain mucus plugs, cell debris and other secretions by squeezing out and flushing them out. It can also be performed by direct imaging and drug injection via microcatheter. The majority of hospitals perform tubal imaging and treatment under a general X-ray machine, which has many drawbacks, such as aseptic conditions not meeting the requirements, large amount of radiation received by the patient, low clarity of tubal display, inability to observe the dynamic situation of tubal peristalsis, etc., thus affecting the accuracy of tubal diagnosis and treatment. Advantages of using DSA system and interventional operating room: 1. Continuous and complete dynamic images of the entire peristaltic movement of the fallopian tubes can be obtained through the digital subtraction function. 2.Since the images of bones and soft tissues are subtracted, the images of uterus and fallopian tubes can be displayed in high definition, which improves the accuracy of diagnosis and can record the treatment process completely. 3. Due to the design features of DSA machine, the amount of radiation can be reduced by about 70% compared with ordinary X-ray machines, and the radiation dose received by patients during the operation is smaller. 4.The application of high-pressure syringe in the procedure replaces the traditional hand-pushed contrast imaging. The flow rate, total volume and pressure of the injected contrast agent can be pre-set, and the optimal injection pressure can be automatically adjusted through computer-controlled execution, which obviously reduces the patient’s pain during the imaging process and avoids damage to the uterus and fallopian tube mucosa due to excessive pushing pressure, improving the accuracy of diagnosis and treatment. 5. The success rate of uterine and tubal intubation can be significantly improved by using DSA pathogram technology. A clear surgical pathogram can be easily obtained by injecting a small amount of contrast into the uterine cavity, which can precisely determine the location of the uterine angle and the obstructed end of the fallopian tube and improve the success rate of intubation and tubal recanalization. It avoids the damage to the uterine mucosa and fallopian tubes caused by blind operation and reduces the complication rate. It greatly shortens the operation time and reduces the X-ray radiation dose to patients and doctors. 6. The operation is performed under asepsis in the interventional operating room to avoid uterine and pelvic infections caused by the operation.