In the measurement of surface topography of objects based on fringe projection, the fringe phase distortion is the main factor affecting the accuracy of object measurement. In order to accurately determine whether the fringe phase has phase distortion, the fringe pattern is analyzed from the frequency domain by means of Fourier transform in the phase correction algorithm, and a technique for discriminating the phase distortion of the interference fringe based on frequency domain analysis is formed. Using the basic principle of Michelson interference, the parallel beam interference projection device is built, the interference fringes are projected onto the light screen, the image is collected by the CCD camera, and the obtained interference fringe image is transmitted to the computer, and then the image is filtered by wavelet filtering. The noise and interference are transformed into a frequency domain image by Fourier transform, and the energy distribution information of the adjacent position of the fundamental frequency in the frequency domain image is analyzed to determine whether phase distortion occurs. The experimental results show that the method can accurately determine whether the fringe image has phase distortion, and the recognition sensitivity is 60 mrad.