The invention discloses a high-precision battery model parameter identification method and a high-precision battery model parameter identification system based on output response reconstruction. The method comprises the following steps: based on a relation between a measured voltage signal and a real voltage signal and a relation between the real voltage signal and an excitation current signal, determining a reconstructed pulse function; reconstructing a voltage signal through the reconstructed pulse function and the current excitation signal; and based on the reconstructed voltage signal andthe excitation current signal, obtaining a battery equivalent circuit model parameter. The method and the system provided by the invention have the following beneficial effects: the reconstructed output signal is highly real and parameter identification precision is high; and a process of parameter selection is saved, and the process of parameter identification is enabled to be simpler and clearer.