Ordinary big round knife, cutting epidermis; Ordinary small round knife, incision of peritoneum; Plastic small round knife, used for making small incision; Sharp knife, open the cavity pipeline; Sickle knife for tonsil surgery. In addition, there are vascular forceps (large, medium and small), tweezers (toothed and toothless), tissue forceps, oval forceps, cocoa forceps, intestinal forceps, right-angle forceps and so on. There are many kinds, so choose the corresponding instrument according to different operations. Generally speaking, any operation requires vascular forceps, tweezers, scissors, knives and needle holders.