 Aortic dissection AD aneurysm is a common catastrophic aortic disease in clinical setting. Conservative therapy of heart rate and blood pressure control in the acute phase is the essential treatment as guidelines recommended. Nevertheless, there is no unanimous optimal target for blood pressure in patients with AD so far. The American Heart Association and the Canadian Cardiovascular Society recommend the blood pressure should be controlled to lower than 14090mmHg, while for patients with diabetes or chronic renal failure, the blood pressure target should be no less than 13080 mmHg. Recently, the Japanese Circulation Society recommended that the blood pressure should be controlled to no less than 130mmHg. However, there was few large-scale, randomized, controlled studies reported on the effect of different blood pressure control levels on the prognosis of patients with AD. Hence, the intensive control of blood pressure to 120 mmHg, compared to 140 mmHg, may improve the patients outcome. Thus, in this study, the effect of intensive blood pressure control 120mmHg with conventional blood pressure control 140mmHg on the prognosis of ABAD patients will be compared, and to identify the therapeutic efficacy of intensive blood pressure control on the ABAD patients. 