Abstract: In order to measure the rotation angle and the distribution of polarized light in optical rotation effect accurately, a new method based on polarization beam imaging is proposed. The theory of the rotation angle of field measurement is reviewed and the system of photoelectric detection is designed. With a polarized beam splitter, the light is split into S light and P light which are acquired by a high resolution CCD. The image is filtered by a median filter, the matching processing based on singular value is implemented, and signal processing is used to eliminate the source fluctuations. The results show that it can detect the two-dimensional distribution of rotation angle from the light source fluctuation rapidly and accurately, and the standard deviation is only 40% of the traditional measurement methods.