With the popularity of optical communication technology,there is a growing recognition that the filter plays a significant role in wavelength division mult iplexing technology. However,traditional filters have some disadvantages which are supposed to be im proved and optimized,such as large size,poor filtering performance and complicated prepar ation.In order to solve these problems effectively,this paper designed two types of one-dimensio nal photonic crystal narrow-band filters with (AB)NBM(AB)N and (AB)N(BA)N structur es.At the same time,the transfer matrix method was be used to calculate two photonic crystal filters .The photonic band gaps were analyzed and the effect of different parameters on the filtering perfo rmance was explored on the basis of the optimized design structure.The results show that: the one-dimensional laminated defect type photonic crystal narrow-band filter and the one-dimensional mirror image type photonic crystal narrow-band filter are able to obtain a narrow transmission band within a certain wavelength range,the transmittance at the na rrow band of laminated defect type photonic crystal is close to 99% and the mirror image type photonic crystal′s transmittance is 96%,as well as present excellent filtering performa nce,which can meet the narrowband filtering technical requirements.It is expected to be widely use d in optical wavelength division multiplexing technology.