This work demonstrates an all-optical slow light Time Division Multiplexing (TDM) structure based on photonic crystals (PCs). The structure shows good ability of dividing time domain signal into repetition time slots signal by four tunable group velocity waveguides from 0:006 ⁄ c to 0:248 ⁄ c where c is the velocity of light in the vacuum at the center wavelength of 1550nm and over a bandwidth 4.52THz with group velocity dispersion below 10 2 ps 2 /km. New high e-ciency Y-type directional coupling output can get larger than »1.4 times intensity and »93% loss improvement which are comparable to conventional output device. The proposed PCs waveguide structure is leading the way to achieve the TDM application and has good capability to extend the application of the optical communication and optical flber sensors systems.