Marfan’s syndrome has a life expectancy of 30-40 years, depending on the extent of the lesion and the effectiveness of treatment. Marfan’s syndrome is an autosomal dominant disorder that causes lesions in the cardiovascular, skeletal, connective tissue, and ocular tissues, with clinical manifestations such as tall stature, spider fingers, and high myopia. Usually, untreated patients can survive into their 30s and 40s. In addition, if Marfan’s syndrome does not develop in the long term, or if the aneurysm is treated surgically in time, it may have little impact on life expectancy. If the patient has extensive aortic lesions and is not treated promptly and effectively, there may be an increased risk of aortic coarctation aneurysm, and once the aneurysm is formed, there is always a risk of sudden death. Patients are advised to go to the cardiovascular medicine department of a regular hospital in time to receive standardized treatment by a professional doctor and to pay attention to regular follow-up.