The purpose is to stop bleeding, reduce the further pollution of the wound, and prevent the aggravation of tissue damage and rapid transport. Including: ① hemostasis, local pressure bandaging is the simplest and most effective method to stop bleeding in hand trauma, and tourniquet or hemostatic forceps can be used when large blood vessels are injured; (2) Wound dressing, using sterile dressing or cleaning cloth; ③ Local fixation, whether there is obvious fracture or not, should be properly fixed.