Minimally invasive surgical methods for hemorrhoids are those that are less invasive, have a quicker recovery and are less painful. The most common ones are as follows: 1. Injection therapy. The drug is injected into the hemorrhoid nucleus to produce sterile inflammation and achieve the purpose of hardening and shrinking the hemorrhoid nucleus. commonly used drugs are elimination of hemorrhoid injection, peony times injection, alum vine hemorrhoid injection. 2, PPH, also known as anastomosis hemorrhoid supra-mucosal circumferential hemorrhoidectomy. It is mainly for hemorrhoids that are mainly prolapsed internal hemorrhoids. 3. Ligature technique, also known as RPH, is to ligate the hemorrhoid nucleus by means of rubber rings and elastic threads to break the flow, necrosis and fall off to achieve the purpose of cure.