There are several methods of brachial plexus anesthesia, including the interosseous groove method, axillary method and supraclavicular method, which are the three commonly used methods of brachial plexus block. In the interosseous groove method, the anterior oblique muscle and the middle oblique muscle are mainly located, and after finding these two muscles, puncture and drug injection can be done to achieve brachial plexus block anesthesia. This method of anesthesia may not be as effective as the ulnar block. There is also a supraclavicular anesthesia method. The supraclavicular method mainly involves puncturing 1 cm above the midpoint of the clavicle, puncturing the top of the bone, that is, the first rib, drawing back no blood to inject anesthetic drugs, which can achieve the effect of blocking the brachial plexus nerve. Another method is the axillary method, which is to feel the pulsation of the axillary artery at the top of the armpit, and then puncture next to the axillary artery to inject the drug to block the brachial plexus nerve.