In addition to the symptoms of local injury, the main symptoms are partial obstruction of blood supply to the hand, including weakness and loss of pulsation of the ulnar or radial artery, cold sensation in the fingers, skin allergy and numbness. If the injury affects the superficial palmar artery arch, Raynaud’s sign may appear in the fingers, and the small fissure atrophy sign may also appear. It is not difficult to make a diagnosis based on the trauma and clinical manifestations, because the compensatory function of the collateral circulation is good, except for 10% to 15% of the palmar artery arch anastomosis is poor, the treatment outcome is mostly good. Therefore, arteriography is generally not required unless it is very necessary. How to prevent weakening and loss of pulsation of the ulnar or radial artery: 1. Repair is the main concern: for forearm arterial trunk dissection, repair and functional reconstruction is required in principle. In most cases, ligation of only one arterial trunk has little effect on the function of the hand, but in the case of defective palmar artery arch, it may affect the function of the hand, so repair should be performed as a last resort. 2, the ulnar artery and radial artery rupture at the same time: must be repaired, otherwise it will seriously affect the hand function. The caliber of ulnar artery is thicker, especially located above the common interosseous artery, end-to-end anastomosis is not difficult, and cephalic vein graft can be used if necessary.