The invention discloses a gait double-side symmetric evaluation method based on a regression curve. The gait double-side symmetric evaluation method comprises the following steps of utilizing an acceleration sensor to obtain foot three-axis acceleration information in the gait movement, and denoising and pretreating the obtained acceleration information; extracting a denoised acceleration signal, respectively calculating double-side symmetric indexes in a continuous gait cycle, and quantitatively analyzing the symmetry of the gait. The gait double-side symmetric evaluation method has the characteristics that the simplicity and accuracy are realized; the broad application prospect is realized in the field of gait balance ability analysis and the like.