To study the influence of liner offset on the jet forming and armor breaking process of shaped charge， the numerical model verified by pulse radiography and penetration depth tests was used to investigate the evolution of the pressure distribution on the liner surface， molding parameters and penetration depth under different offsets ranging from 0~0.05D_k. The allowable range of liner offset that meets the requirements of good jet performance was obtained. In addition， the variation law of jet shape and lateral velocity under the coupling of liner deflection and deflection was discussed. The results show that the liner offset affects the symmetric distribution of liner surface pressure at 10μs and 12 μs after initiation （middle and late collapse process）， and a negligible effect observed at 10 μs and 12 μs after initiation（early and finally collapse process）. When the liner offset is 0.0125D_k， the jet maintains good collimation and continuity， and the penetration depth decreases by 6.6% compared with the axisymmetric case； When the offset exceeds 0.0125D_k， the jet bends in a bow shape and breaks at severe bending， with the decrease of penetration depth exceeding 10%. When the deflection angle of the liner is -0.015α， and the deflection changes from 0 to -0.0125D_k， the bending direction of jet changes， and the bending degree decreases first and then increases.