Rapid-acting insulins are currently commonly used, including menthol insulin and lysergic insulin. Rapid-acting insulins have the characteristics of rapid onset of action and short time to peak, and are mostly used to control postprandial blood glucose, which can effectively control postprandial blood glucose up to the standard, and can be chosen to be injected subcutaneously before meals, and can be eaten immediately after the injection. Fast-acting insulin has the characteristics of easy application, flexibility, low risk of hypoglycemia and no weight gain. It is suitable for patients with type 1 diabetes, type 2 diabetes and other types of diabetes, especially for elderly diabetic patients, and can be used in combination with other hypoglycemic drugs or insulin. In clinical practice, it is mostly used in combination with long-acting insulin for intensive glucose-lowering treatment of insulin, and can also be applied in insulin pumps for intensive glucose-lowering treatment.