给出了在任意入射角下光子晶体的透射率、反射率及光在光子晶体内部场强分布的正确表达式.在此基础上,研究了入射光角频率分别为基频奇数倍、偶数倍时在光子晶体内部的场强分布.此外,还研究了不同入射角、光入射方向及缺陷层对场强分布影响,得到了一些新的有价值的结果,这为光子晶体的制备提供了依据. The correct expressions of the transmissivity, the reflectivity and the field intensity distribution of photonic crystal inside the photonic crystal at any incident angle are given. Based on this, the incident angular frequencies of the incident light are respectively odd and even multiples of the fundamental frequency The distribution of the field intensity inside the photonic crystal is also studied.Furthermore, the influence of different incident angles, light incident directions and defect layers on the field intensity distribution is studied and some new valuable results are obtained, which provides a basis for the preparation of photonic crystals .