In order to reduce the speckle noise in phase distribution of deformation, a non-threshold windowed Fourier filter algorithm was proposed.The maximal amplitude of stripe frequency is set as the filtering criterion by scanning the amplitude of stripe frequency in the window, which the optimum frequency image is obtained and the threshold window is not set in the window Fourier filter algorithm. And the proposed algorithm is used on the fringe patterns. Experiment results show that the proposed algorithm have a better performance in reducing the speckle noise and a high precision in phase calculation. The algorithm proposed can be used to filter other images as a low-pass filter.