One dimensional photonic crystal is designed for solar cells reflector with medium SiO2 and TiO2.The reflection spectrum of the photonic crystal from visible light to near infrared wavelength is simulated with the transfer matrix method.The variations of reflection spectra at different incident angle and with different number of cycles are discussed respectively.The results indicate that at the normal incidence,the number of the band gap increases and the gap width narrows in the short wavelength as the number of cycles N increasing,whereas,the reflectivity increases in the long wavelength under the same condition.The average reflectance increases as the incident angle θ increasing;therefore the photonic crystal has better tolerance in angle,which can be used as the reflector to improve the efficiency of solar cells.