A reconstruction method of atmospheric polarization mode ∞ shape based on Hough transform is proposed. Based on the mathematical model of polarization angle, the proposed method obtain ∞ shape representation equation. Hough transform is used to solve the unknown parameters. Equation parameters are calculated from the polarization angle information, and ∞ shape is reconstructed. Experimental results show that the reconstruction accuracy of ∞ shape is better than 99%. The proposed method can reconstruct ∞ shape from the polarization mode efficiently, which provides a new idea for the subsequent polarized light navigation.