The characteristics of optical fibre Bragg reflective filter (FBR) are analysed on the bssis of asymmetric five- layer optical waveguuide model, and the structural parameters of FBR are discussed for broad and narrow bsnds with high reflectivity. The experimental studies on FBR are presented in this paper, including fabrication technologies and measurement method. Typical Performances of our FBR devices are as follows: 80% reflectivity and 1.5 nm bandwidth (FWHM) at 1.5μm region.