Angiography refers to the injection of contrasted drugs into the blood vessels, and the contrast agent shows the vascular images under X-ray. The X-ray imaging film can visually show the abnormal manifestations of blood vessels and diagnose vascular lesions, and compared with ordinary examinations, angiography is the gold standard for the diagnosis of vascular diseases. At present, the imaging methods include traditional angiography and digital imaging, among which digital imaging has a three-dimensional effect, but angiography is not suitable for all patients, and the indications for angiography should be strictly grasped.