A snake bite requires early access to a hospital. A tourniquet or tourniquet substitute should be applied to the proximal end of the limb bite over one joint to block the return of venous blood and lymphatic fluid, and relaxed for 1 minute every 15-30 minutes to avoid limb necrosis. The patient should be kept quiet and preferably transported by another person if conditions permit. Movement of the injured limb should be limited and absolute bed rest is required to reduce toxin absorption. The skin around the wound should be cleaned with soap and water, and sucking can be done with a breast pump or by cupping. In case of emergency, sucking by mouth in time is also possible, when the mucous membrane of the mouth should not be broken or carious, spit while sucking, then rinse the mouth with water to suck out the poisonous juice as much as possible, and the accompanying person needs to transport the injured person to the hospital as fast as possible.