TST (Tissue-selecting Therapystapler), also known as selective supra-hemorrhoidal mucosal anastomosis, is regarded as the safest minimally invasive technique so far by the anorectal treatment community and is a new technique recently developed on the basis of the PPH procedure. Locking the hemorrhoid nucleus, regulating the scope of hemorrhoid mucosa removal for the size and amount of the nucleus, maximizing the protection of the normal function of the anus. The TST surgery follows the formation mechanism of human hemorrhoids and is designed according to the physiopathological structure of hemorrhoids, aiming to correct the pathophysiological changes of hemorrhoids instead of removing all the anal cushions, preserving the normal anal cushions and mucosal bridges, which can reduce the surgical trauma, maintain the fine sensation and contraction function of the anus to the maximum extent, minimize postoperative anal discomfort, shorten the treatment time and make the hemorrhoid surgery more minimally invasive. Technical advantage of precise positioning: Using the specially designed anoscope, it can precisely locate the prolapsed mucosa and successfully and safely selectively remove the suprahemorrhoidal mucosa at the prolapsed area, which is in line with the theory of liner downward migration and reduces surgical trauma.