Abstract: The processes for the jet penetrating at different impact angles into a semi-infinite target with V-shaped sandwich explosive structure are simulated numerically by using the 3D finite element code (LS-DYNA). Simulated results are compared with the corresponding cases without sandwich explosive structure. After ignition of the V-shaped sandwich explosive，the active face and back plates have great disturbance and cutting effect on the jet, which make the jet deviated, bended and the penetration capability decreases about 30％～90％. Disturbance of V-shaped sandwich explosive structure on jet increases with the increase of the impact angle. Variations of V-shaped angles cant disturb observably penetration of jet.