Objective This study explores the hemodynamic performance of aortic dissection after lesions and provides a more scientific basis for the next treatment of patients. Methods Based on the CTA image data of a patient with complex Stanford B-type aortic dissection, a personalized aortic dissection model with different fracture shapes (H-type, O-type, and V-type) at the proximal end of the aortic dissection was established, combined with computational fluid dynamics (CFD) and morphological analysis methods to analyze the velocity distribution of the fracture section, the velocity distribution of the flow path, the wall pressure distribution and the wall shear stress distribution. Results The flow velocity, the highest pressure difference, and the proportion of wall shear stress at the entrance of the H-shaped rupture showed larger hemodynamic parameters than the other two types. The hemodynamic parameters and rupture parameters of the aortic dissection are related to the type of mouth. Conclusion The risk of dissection rupture of type H fracture is greater, type V is the second, type O is the smallest, which provides an effective evaluation basis for further numerical analysis of cases and formulation of treatment plans.