As a special kind of fiber Bragg gratings, tilted fiber Bragg gratings (TFBG) have some good features, which are of great application value in optical filtering, fiber sensors, optical fiber communication, etc. In this paper, the mode coupling mechanism of TFBG is briefly introduced. Then a general review on the theories, fabrications and applications of TFBG is presented. The TFBG is a potential technique to suppress stimulated Raman scattering in high power fiber laser systems based on its filtering characteristics.