The invention relates to the technical field of aseismic design, and particularly to a performance-based multi-modal aseismic-design method based on a performance level. The method is a method of directly carrying out aseismic design on the basis of the quantified performance level, the aseismic-design method based on the performance level uses final damage status as a basis of aseismic design, and thus aseismic performance of a structure can be controlled regardless of whether an earthquake exceeding fortification intensity (ground motion parameter) occurs. Obviously, the method of the application is more scientific than performance-based traditional aseismic design based on the fortification intensity (ground motion parameter), and can control aseismic behaviors of the structure.