The relationship between reflected polarization properties of apodized low-birefringence fiber Bragg gratings and temperature effect are analyzed theoretically. Numerical value simulates reflection spectrum of the apodized low-birefringence fiber Bragg gratings, polarization dependent loss and differential group delay curves with wavelength.The reflected center wavelength, polarization dependent loss and differential group delay which evolve with wavelength are measured under different temperature and the curves are drawn accordingly. The evolution of polarization dependent loss and differential group delay are analyzed according to the results of the experiment. In the experiment, reflected polarization dependent loss presents two peaks which shift to an equal extent as temperature changes and it indicates that polarization dependent loss has no significant difference. The maximum of difference group delay with temperature increase linearly shifts to long wavelengths and it is proved that the loss of orthogonal modes has changed equally. The synthetical theory analysis and experimental results show that the evolution of reflected polarization properties of apodized low-birefringence fiber Bragg gratings changes obviously with temperature changing and the changing of orthogonal modes presents proportional characteristics.