Abstract: The four-heterostructure photonic crystal (AmaBmbCmc)m(DndBnbDnd)n(CmcBmbAma)m optical filtering properties were structured and studied by using transfer matrix method. The results show that it can realize adjustable multi-channel optical filtering function in the photonic crystal. When the number of periods m=6, n=1, ma=mb=mc=nb=nd=1, there are two narrow separate transmission peak in the transmission spectrum of the photonic crystals and it can realize dual-channel optical filtering function; when the periods number m increases, photonic crystal keep two-channel filter function, but the quality of dual channel optical filtering will be increased. When the periods number n increases, the number of the narrow transmission peak for the long wave will gradually increase, the photonic crystal implement n+1 channel optical filtering function; when the periods number nd increases, the number of narrow transmission peak will be increased by times and it can realize multiple sets of dual channel optical filter function. The four-heterstructure photonic crystal optical transmission characteristics can provide theoretical basis for designing a new type of tunable channel in designing photonic crystal optical filter.