Arterial plaque is caused by abnormal metabolism of lipid substances in the blood and deposition in the intima of arteries. The elasticity of blood vessels decreases accordingly after the appearance of arterial plaque, and the blood vessels harden. Enlarged plaques also cause changes in the internal diameter of the blood vessels, resulting in stenosis or even occlusion-like changes. The current treatment of subclavian artery plaque is mainly divided into conservative treatment and surgical treatment. Conservative treatment is mainly based on medication, which requires oral antiplatelet drugs, such as aspirin enteric tablets and clopidogrel, and oral lipid-lowering drugs, which are mainly atorvastatin calcium, and is suitable for patients with mild symptoms. For patients with significant stenosis of the internal diameter of the blood vessels, or even with ischemia of the upper limb arteries, dizziness, head confusion and other manifestations similar to the blood-stealing syndrome, active surgical treatment is required. The common method of surgical treatment is endoluminal treatment, in which the narrowed and occluded subclavian artery is opened to maintain blood flow through guide wires, catheters, balloons, and stents, and is combined with medication. For subclavian artery plaque, regular follow-up is required, usually every six months or every year to review the ultrasound to clarify the lesion.