Abstract：Blasting is frequently used in cutting excavation during highway construction in mountainous area. Blasting vibration has negative effects on slopes，and the slope stability will exert great influences on the safety and economy of construction and the transportation. Therefore，a nonlinear FEM software―DYNA2D was used to simulate the effect of blasting vibration on slope stability. The laws of distribution，transmission of stress，velocity and acceleration，and displacement of observation points are analyzed，which are used to compare with the results of in-situ test. The results are as follows：(1) on the surface of the slope，the maximum velocity and displacement appeared at the bottom of the slope，but the values are permitted；(2) within the rock mass，a large tension stress area exists，but the values of stress are not large enough to break the rock mass；and (3) in practical blasting vibration construction，monitoring should be performed at the bottom and top of slopes to ensure the velocities of permitted vibration. The results show that the adopted scheme of blasting is feasible，and numerical simulation can provide important proposal for practical engineering.
