Sodium nitroprusside is generally preferred for the treatment of hypertensive crises, with a rapid onset of action, short duration of action, and minimal adverse effects. The drug can directly and simultaneously dilate arteries and veins, reducing the anterior and posterior loads. During use, blood pressure needs to be closely monitored and the drip rate adjusted according to the blood pressure level. The second commonly used is nitroglycerin, the drug dilates the veins and selectively dilates the coronary arteries and large arteries, and the effect of lowering blood pressure is slightly weaker than sodium nitroprusside, but the effect is rapid and the adverse effects are mild, mainly used in patients with hypertensive emergencies accompanied by acute heart failure or acute myocardial infarction. Treatment with drugs that prevent cerebral edema such as mannitol and tachycardia. Appropriate use of sedatives, such as Valium, sodium phenobarbital, chloral hydrate, etc., when convulsions occur. The whole process should pay attention to the slow and smooth lowering of blood pressure, not sudden and rapid lowering of blood pressure, so as not to cause insufficient blood supply to the cardiovascular and cerebrovascular vessels, and dangerous.