Infertility is one of the major medical and social problems facing today’s society and is tricky to treat. The tubal blockage or tubal incompetence is an important cause of female infertility, accounting for about 1/2 of all infertility cases, and tubal dilation and recanalization by DSA (SSG+FTR) is an emerging minimally invasive treatment for tubal blockage in recent years. Based on hysterosalpingography, SSG+FTR is a minimally invasive treatment for tubal obstruction. It is an interventional technique to unblock the fallopian tubes to the umbilical end by advancing, dilating and separating the tubes through the uterine cavity with catheters and guide wires under X-ray. Cases suitable for tubal intervention include: 1) interstitial tubal obstruction; 2) tubal isthmus obstruction; 3) tubal passage but not patency; 4) tubal passage but very poor patency; 5) high tubal tension, slightly or poorly passed or very poorly passed; 6) mild adhesions at the umbilical end of the fallopian tube and very poor patency; 7) bilateral horn obstruction, etc. DSA tubal dilation and recanalization is a non-invasive procedure, which requires only A normal body temperature and negative leukorrhea for 3-7 days after menstruation are sufficient. After surgery, oral antibiotics should be taken for 3 days and intercourse and tub bathing should be prohibited for 2 weeks. It is a simple operation with little risk. The success rate is high, with a recanalization rate of 98% or more, and the efficacy is good, with a recanalization rate of about 40%, and the risk of ectopic pregnancy can be greatly reduced.