Surgical hand washing and hand disinfection are necessary procedures before surgical operations. The purpose of these procedures is to remove dirt and temporary resident bacteria from the fingernails, hands and forearms of the surgical personnel, reduce the resident bacteria to a minimum, inhibit the rapid growth of microorganisms, and prevent the transfer of bacteria from the hands of medical personnel to the surgical site.However, dry hand is an important part of surgical hand washing. At present, all hospitals mainly use sterile towels or disposable dry toilet paper for sampling. Probably, most medical institutions use sterile towels, which is also the most traditional way to dry hand.Clean small towels are packed for autoclaving. The sterile cloth is opened before use, and it is valid for 4 hours after opening. Use one towel for one person, then return to the supply room for cleaning, drying, packaging and autoclaving, so repeated use. The cost is mainly the process of cleaning, disinfection and sterilization, plus the cost of non-woven cloth and small towels.