The invention provides a colored repeated sentence spectrum construction method for speech reconstruction, and belongs to the technical field of speech signal processing. The method is characterized in that two color channels respectively serve as a real part and an imaginary part in fourier transform; the position coordinates of R-B synthetic color in an R-G-B color space are corresponding to the real part and the imaginary part in the fourier transform, wherein G is the symbolic combination of the real part and the imaginary part. According to the method, the real part, the imaginary and the symbols of the real part and the imaginary, corresponding to the repeating number, can be analyzed according to the R-G-B color ratio; the speech spectrum is subjected to image processing, then the speech is reconstructed, thus the fourier transform can be performed by enhancing the speech by the image processing technology and the like, and as a result, the speech reconstruction is realized.