The fabricating technique of blazed fiber Bragg grating was presented.BFBG fabrication technique was discussed.By phase mask method,several BFBG in different tilt angle were successfully fabricated on H2-doped photo sensitive fiber.Their transmission spectrums were also presented.A fiber Bragg grating sensing interrogation system using BFBG as the core wavelength division component was proposed.A photo detector was put on the focal plane of the lens to detect the light.BFBG was used to tap light out of the fiber core to fiber cladding.The scheme and result was discussed in detail.