Abstract: In order to design high performance filters based on photonic crystal waveguide, new band-stop filter was proposed by introducing a series of tooth-shaped defects into 2-D photonic crystal waveguide. Transmission characteristics of tooth-shaped photonic crystal waveguide were studied by finite element method. The results show that, for single tooth-shaped defect, resonance frequency generated by defect leads to a band-stop structure and good narrowband filter is achieved. Resonance frequency can be modulated by changing the depth of defect. For multiple tooth-shaped defects, due to the coupling effect, a series of defects form a wide band stop of photonic crystal waveguide with relatively wider bandwidth. Photonic crystal waveguide filters can be simple and fiexible adjustment by introducing tooth-shaped defects to achieve narrow/broadband filters. The study has potential value in the design of photonic filter devices based on photonic crystal waveguides.