According to the principle of surgery can be divided into three categories: protruding (or prolapse) hemorrhoidal block direct excision; hemorrhoidal block suspension reset; blockage of hemorrhoidal artery. The protruding (or prolapsed) hemorrhoidal block direct excision: external hemorrhoidectomy; thrombus stripping; external peeling and internal ligation, ring hemorrhoids segmental external peeling and internal ligation. Hemorrhoidal block suspension reset: not direct excision of hemorrhoidal block, but the hemorrhoidal mucosa ring excision (PPH) or partial excision (TST); hemorrhoidal mucosal ligation. The prolapsed hemorrhoid can be lifted up so that it will not prolapse again. Hemorrhoidal artery ligation; Sclerotherapy. The blood flow supplying the hemorrhoids is cut off, so that the congestion and proliferation of hemorrhoids are gradually reduced.