With the development of society, the influence of environmental factors, the increase of mental stress and the increase of social openness, there are more and more female patients with infertility, among which those with infertility due to tubal obstruction are particularly prominent. There are various causes of tubal obstruction, mainly inflammation and mucus embolism. In women, due to the physiological and anatomical structure, inflammation is easily caused by infection, which leads to adhesions in the fallopian tubes and pelvic cavity, causing obstruction in the lumen of the fallopian tubes or structural changes in the tubal travel, reducing the chance of egg and sperm binding or weakening the motor function, affecting pregnancy. For such patients, the narrowed part can be unblocked by micro-guide wire and then injected with drugs under pressure through micro-catheters, which can usually be unblocked. It is better to have several post-operative lavage treatments to consolidate the efficacy. Of course, not all inflammatory blockages can be opened, for example, tuberculosis, occlusion of the fallopian tube far from the jugular abdomen and patients with no opening in the interstitial part of the fallopian tube are not indications, in addition, occlusion of the long segment of the fallopian tube is also not a good indication. Mucus plug is also the main cause of blockage of the fallopian tubes, which is mostly a local blockage of the proximal end of the fallopian tubes, and can easily be unblocked successfully by intrauterine pressure treatment, and those that are not unblocked can be unblocked successfully by micro-conducting silk.