To solve water surface glint interference problem in the reconnaissance, detection, and recognition of water surface and underwater targets, this paper uses polarization characteristics to suppress water surface glint and enhance targets. For this purpose, the propagation laws of the polarization characteristics of light waves during the reflection and refraction of such waves at the water surface are analyzed. According to the relationship between the intensity distributions of light waves in perpendicular and parallel directions, this paper proposes a suppression method for water surface glint based on the reflection and refraction polarization effects. This method achieves the separation and suppression of water surface glint by using the degree of reflection polarization, the degree of refraction polarization, the perpendicular light intensity image, and the parallel light intensity image. A saturated light intensity restoration method based on complete polarization decomposition is proposed to address the problem of saturation distortion of the perpendicular light intensity image in the suppression of saturated glint. The perpendicular light intensity image can be calculated and restored with the parallel light intensity image and the light intensity image obtained in any unsaturated polarizing direction. Then, the restored perpendicular light intensity image can be used to suppress the saturated water surface glint. The experimental results show that the suppression of the water surface glint effectively increases both the contrast and the signal-to-noise ratio between the target and the background in the glint area and thereby enhances the prominence of the target.