A self-temperature compensated fiber Bragg grating (FBG) acceleration detection system is designed based on the narrow line width and tunable characteristics of distributed feedback (DFB) laser.A simply-supported beam based FBG low-frequency accelerat ion sensor is realized.By increasing the temperature compensation optical path,the wavelength of DFB laser is controlled in real time to implement temperature self compensat ion.The results show that the system has good response to impulse excitation signal and continuous acceleratio n excitation signal,the natural frequency of the system is 25.1Hz,the maximum acceleration sensitivity of the system reaches about 1.89V/m·s^2with 0～400Hz frequency response range,an d the system has good temperature stability.