The proceedings of jet formation to whole hemispherical liner and hemispherical liner with hole were numerically simulated with the finite element code LS-DYNA3D. The distinctions between the whole hemispherical liner and the hemispherical liner with hole were presented by theoretical and numerical way. The distinctions between velocity and offset direction were accentuated. The theoretical presents and numerical results are found to be in good agreement with the experimental data, and are reasonable and helpful for engineering design.