Considerable research efforts have been devoted to the investigation of distributed feedback (DFB) organic lasing in photonic crystals in recent decades.It is still a big challenge to realize DFB lasing in complex photonic crystals.This review discusses the recent progress on the DFB organic laser based on one-,two-,and three-dimensional photonic crystals.The photophysics of gain materials and the fabrication of laser cavities are also introduced.At last,future development trends of the lasers are prospected.