By now,various fabrication methods of fiber gratings have been propo sed,but corresponding types of phase mask or UV exposuring optical paths are needed,which makes the fabricatio n of fiber Bragg grating not flexible.In this paper,a fiber grating fabrication technology of phase mask moving controlled by high accuracy PZT actu ator is introduced.By this method, the AC modulation of refractive index and the phase of fiber gratings can be tun ed freely by reasonable movement rule of the phase mask.So various fiber gratings,such as phase-shifte d,apodized and chirped ones,can be made easily.The experimental system is built up and the mentioned fiber gratings are fabricated.This technology has improved the flexibility of fiber gratings manufacturing process obviously.