Abstract: This research constructed and studied the optical transmission characteristics of heterostructure photonic crystal ABC)6D(ABC)6, that the physical thicknesses dA, dB, dC and dD of A, B, C and D can be used to adjust the transmission peak wavelength in the heterostructure photonic, to achieve short-wave and long-wave dual-channel optical switching, and the response sensitivity are different when the optical thin films thickness is changed by different dielectric medium. For short-wave channel optical switch, the transmission peak wavelengh will be increased with the thickness of dA, dB, dC and dD become thicker,this change is most sensitive to the response of dC, second to dB, and weakest to dA. For long-wave channel optical switch, with dA, dB, dC and dD increasing respectively, the transmission peak wavelengh moves to the long wave direction, this change is most sensitive to the response of dC, second to dD, and weakest to dA. The optical transmission characteristics of quaternary heterogeneous structure photonic crystal can provide a reference for the photonic crystal design of the new optical switch or filter devices.