In order to improve the sensitivity of vibration sensor in the measure ment of acceleration signal,a new type of fiber Bragg grating vibration acceleration se nsor based on the combination of cantilever beam and sliding rod is presented in this paper.T he structure and working principle of the sensor are described,and the theoretical formulae of the natural frequency and sensitivity of the sensor are derived.Finally,the natura l frequency and sensitivity of the sensor are tested by vibration table.The exper imental results show that the wavelength of the fiber Bragg grating changes only in the axial direction,an d the flat area of the sensor frequency response curve is betwee n 10Hz and 38Hz. The natural frequency of the sensor is 62Hz and the sensitivity is 52.8pm/g.Co mpared with the fiber grating with force only along the axis,the acceleration s ensitivity is increased by 70.8%.