Being used as sensors of vibration is one the most important uses of fiber Bragg grating (FBG).Firstly,the normal principle of the sensors with FBG is introduced.Then we summarize five kinds of demodulation of vibration with FBG that are commonly used.The principle and scheme of the experiment are given respectively,and their character and function (especially the measurement accuracy) are analyzed.This paper provides foundation for the design of the demodulation of vibration with FBG.