For the application of optical sensor in shearer,this paper presents a fiber Bragg grating (FBG) acceleration sensor based on a mass block connected with a base by a flexible hinge. According to the structure model of the acceleration sensor,we give the form ula a about the sensitivity and resonance frequency of the sensor and discuss the effects of the structural parameters on the sensitivity and resonance frequency.Also finite element method is used t o analyze the static and dynamic characteristics of the sensor.A series of optic al fiber sensing experimental results show that the resonant frequency of our prepared sensor is 2kHz,the sensitivity is 22pm /g,the transverse interference is less than 10%,so the sensor is suitable for the measurement with acceleration frequency under 1kHz.