“An’s therapy” is a new method of treating many kinds of anorectal diseases invented and innovated by Prof. An Ahh (also the only Chinese director of the World Society of Anorectal Medicine) of Beijing China-Japan Friendship Hospital of the Ministry of Health. This therapy is short, minimally invasive, less bleeding, painless, short course of treatment, fast recovery, and not easy to recur, thus rewriting the history of anorectal medicine, and has been recognized and praised by colleagues at home and abroad. As the saying goes, “nine out of ten people have hemorrhoids”, in fact, this statement is exaggerated, according to statistics, the incidence of hemorrhoids is about 52.2 percent. From the current treatment of hemorrhoids at home and abroad, the main method is still surgery. The most fatal problem is that the amount and concentration of injection is extremely difficult to grasp, the slightest inadvertence will cause local necrosis and haemorrhage, and it is difficult to rescue. At the same time, the sclerosing agent can also cause sequelae such as local hard knots and stenosis of the anus. The scope of An injection therapy is expanded: from initial internal hemorrhoids to all stages of internal hemorrhoids and varicose veins type of mixed hemorrhoids. Significantly improved efficacy: with one injection, the nucleus of hemorrhoid shrinks immediately and is cured in 3-5 days, with a cure rate of 98%. Safety is guaranteed: no local necrosis, no formation of hard nodes, no rectal stenosis, no bleeding. An’s minimally invasive surgical therapy has an expanded scope of adaptation: it is suitable for difficult diseases such as severe circumferential mixed hemorrhoids, complex anal fistula, rectal abscess, prolapse and rectal tumor. Significantly improved efficacy: 6 to 20 minutes treatment, 3 to 7 days cure, 99% cure rate. Safety is guaranteed: protection of the normal physiological structure and tissues of the anus, painless throughout, fast healing, and no sequelae. The biggest contribution of An’s therapy is the development of the drug “Paeoniflora injection” which can replace surgery and is safe and less painful, this non-sclerosing and necrotizing agent of Chinese medicine only needs one injection, and the nucleus of hemorrhoids can be seen to shrink significantly after 10 minutes and healed after 3-7 days, the cure rate of all stages of internal hemorrhoids and varicose mixed hemorrhoids is as high as 98%. The cure rate for all stages of internal hemorrhoids and varicose mixed hemorrhoids is 98%. “Paeoniflora injection is not only effective for hemorrhoids, but also has a significant softening effect on anal hard knots and scars, and the drug can be injected to treat anorectal stenosis after dilution; at the same time, it can also treat rectal prolapse, anal itching and axillary odor by using the drug’s astringent and fixing effect and activating blood circulation.