A novel way to make long period fiber grating is proposed. Attaching fiber on a periodic ripple metal structure by high temperature metal glue at 200 ℃, a long period fiber grating is fabricated when the temperature of the combined structure declines to room temperature. The temperature characteristics of this kind of grating are tested, and the change of resonance peak for grating spectrum in different temperatures is discovered and its mechanism is discussed. This kind of grating can be used as optical fiber filter and optical fiber attenuator. At last, the easier grating realization by changing the diameter of optical fiber is also discussed.