In order to examine the dynamic impact effect of the self-anchored suspension bridge subjected to hangers fracture, model test for suspension hangers fracture was carried out.A 1:80 test model was developed based on the stiffness similarity theory. The test results indicate:the dynamic impact effects of hangers fracture in different regions are dissimilar. The tensile forces of the adjacent hangers on the same-side and same-span are dynamically redistributed after hangers fracture. Compared with shorter hanger that is adjacent to the broken suspension hanger, the Dynamic Impact Factor(DIF) and the Dynamic Amplification Factor(DAF) of the longer one is greater.The dynamic impact effect is obvious and dynamic impact sensitivity is higher. The peak values of dynamic tension forces of the hangers would be more than twice of the original values generally, and the safety reserve is obviously reduced. The dynamic impact effects of hangers fracture is significant, and it will lead to continuous hangers fracture easily on occurrence of corrosion or other defects of the adjacent hangers and affects the safety of bridges seriously.