Using micro-cantilever beam, the response frequency character of the Bragg fiber grating is studied in the experiments. Its responsed frequency width is 2.5 kHz and the experi mental fitting curve is given. The researches indicate that the shift average values of re flection wavelength scanning of Bragg fiber grating are very sensitive to the resonance frequen cy vn of the micro-cantilever beam.%利用微悬臂梁对光纤Bragg光栅的振动传感特性进行了实验研究，其频率传感范围达到2.5 kHz，并给出了实验拟合曲线．研究表明：光纤Bragg光栅反射波长漂移的扫描平均值△λ对微悬臂梁的谐振频率Vn响应灵敏．
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