Brachial plexus nerve block is a local anesthetic drug injected into the brachial plexus nerve trunk around its innervated tissues to produce nerve block, can be through the supraclavicular method, axillary method, intercostal groove method of puncture. 1. supraclavicular method of puncture: one centimeter above the midpoint of the clavicle puncture into the needle to find the first rib, along the first rib to do a fan-shaped injection of local anesthetic drugs. 2. Axillary method: in the axillary fossa to find the axillary artery pulsation point, puncture at the highest point of the pulsation, the local anesthetic drug injected into the axillary sheath. 3. Intercostal groove method: in the clavicle above the posterior border of the sternocleidomastoid muscle to touch the anterior and middle oblique muscle and scapulohumeral muscle composed of a triangular gap, looking for subclavian artery pulsation point for puncture. It should be noted that there are complications such as pneumothorax and axillary artery injury when performing brachial plexus nerve block, so the operation should actively cooperate with the doctor to avoid complications.