In view of the importance of the relative reflective intensity on retroreflective coefficients estimation and new retroreflective material design,light transmission process in the cube corner elements is modeled,changes of light propagation and light vector polarization directions during reflection or refraction are traced,light intensity loss is calculated based on ray tracing principle.A numerical calculation program is set up for retroreflective light intensity calculations of cube corners under different incident angles,azimuth angles and polarization states.The reflected light relative intensities distributions at different incident angles and azimuth angles are computed with natural light illumination and polycarbonate as the body material.The results show that the reflected light intensity is significantly affected by the incident direction of light.For incident angles smaller than 25.5°,the reflected light relative intensities remain big and approximately constant value of 0.899.For incident angles bigger than 25.5°,the reflected light intensities decrease monotonically and are significantly influenced by azimuth angles.