The method obtaining the static-dynamic comprehensive effect by the superposition of the static and dynamic effect is not applicable for large deformation and nonlinear elastic problems under strong earthquake action. This involves the static-dynamic boundary transformation problem or static-dynamic boundary unified problem. The static-dynamic boundary conversion method is tedious. In addition, the model is not balanced at zero moment and the calculation result is distorted if the node restraint reaction force caused by static boundary condition is not applied. The static numerical solution error is large when the structure possesses tangential static force in a viscoelastic static-dynamic unified boundary. The research poposed static-dynamic unified artificial boundary based on ABAQUS infinite element to solve the static-dynamic synthesis effect conveniently and accurately. The equivalent nodal force calculation formula of infinite element unified boundary was deduced when the external wave input. The calculation and application program of the equivalent nodal forces was developed, which used the Python language to complete the external wave inputting. This boundary does not need static and dynamic boundary transformation, import of stress field and constraint counterforce of boundary nodes. The realization of infinite element static-dynamic unified artificial boundary is relatively simple. Compared with static and dynamic artificial boundary transformation method and viscoelastic static-dynamic unified boundary, the precision of the infinite element unified boundary is higher, especially when the static load is in tangential direction.