Aiming at the disadvantage that the precision of polarized light sensor is easily affected by environmental random noise

Gaussian distribution theory is introduced

and a stochastic characteristic calculation model with physical properties is established. Based on maximum likelihood estimation（ MLE）

the polarization angle of polarized light navigation sensor is calculated. The difference between the traditional calculation model and this model is analyzed. The results show that the new model has higher precision and stability

and can improve the guidance precision of polarized light navigation sensor better.