Real-time health monitoring of the bridge is of great significance. Compared with traditional piezoelectric sensors, Fiber Bragg grating has the advantages of high sensitivity, strong wavelength division multiplexing ability, and strong anti-interference ability. It has been widely used in real-time monitoring of various large structures in recent years. Aiming at the selection of bridge acceleration sensor, this paper proposes a double fiber grating acceleration sensor based on arc cycloid hinge, and analyzes the resonant frequency and sensitivity of the sensor by establishing a mechanical model. The analysis results show that under the condition of different hinge thicknesses, the height of the proof mass and the length of the minor axis of the semi-ellipse have a great influence on the resonant frequency and sensitivity of the sensor. As h and e₂ increase, the mass of the mass block increases, the sensitivity of the sensor increases, and the resonance frequency decreases. As the thickness t of the hinge becomes larger, the resonant frequency becomes larger, and the sensitivity of the sensor becomes smaller. When t is in the range of 1 mm to 3 mm, as c becomes larger, both the sensor sensitivity and the resonant frequency become smaller. According to the bridge in-situ calibration requirements, this paper uses MATLAB to optimize the parameters of the sensor structure. Then use ANSYS to conduct static stress analysis, modal analysis and harmonic response analysis. The modal analysis shows that the first 4 modal frequencies of the sensor model are 471.06 Hz, 2 878.1 Hz, 3 226.7 Hz, 9 208.4 Hz and 13 763 Hz. The static stress analysis shows that the strain produced by the sensor under the acceleration of gravity is 1.4 μm. The harmonic response analysis shows that the resonance frequency of the acceleration sensor model is 474 Hz. After the software simulation, the actual sensor is made and calibrated. When performing resonance frequency calibration, the signal generator sets the signal voltage to 1 V, starts the vibration test from 10 Hz, ends at 650 Hz, and records the wavelength change. The sensor has the largest wavelength variation near the vibration frequency of 460 Hz, and the wavelength variation is relatively stable at 10~250 Hz, that is, the resonance frequency is 460 Hz. When performing sensor sensitivity calibration, set the constant frequency of 30 Hz and 60 Hz on the vibration table as the test frequency of the simulated bridge site. During the 30 Hz test, the voltage value increases from 0.2 V to 0.9 V with a step size of 0.1 V. During the 60 Hz test, the voltage value increases from 0.2 V to 0.7 V with a step size of 0.1 V. When the frequency is 30 Hz, the sensitivity of the dual FBG of the sensor is 43.14 pm/g, and the fitting coefficient is 0.995 7; the sensitivity of the single FBG1 of the sensor is 21.74 pm/g, and the fitting coefficient is 0.997 7. When the frequency is 60 Hz, the sensitivity of dual FBG is 43.21 pm/g, and the fitting coefficient is 0.992 8; the sensitivity of single FBG1 sensor is 21.81 pm/g, and the fitting coefficient is 0.998 9. Set the vibration frequency of the vibration table to 50 Hz, and the input voltage of the signal generator to 0.3 V. The test direction of the acceleration sensor is installed perpendicular to the vibration direction of the hinge, and when the sensor performs vibration sensing perpendicular to the vibration direction of the hinge, the sensitivity of the sensor is 2.456 pm/g, which is much smaller than the sensitivity of the vibration direction of the hinge. The lateral interference degree of the sensor is about 5.7%, which proves that the acceleration sensor has a good lateral anti-interference ability. The calibration experiment results show that the arc cycloid hinge structure FBG acceleration sensor designed and manufactured in this paper has a smaller volume and a higher integration level compared with other FBG acceleration sensors under the premise that the parameters meet the bridge acceleration monitoring. Using a combined elliptical and rectangular mass structure, dual fiber gratings can be engraved on an optical fiber to facilitate wavelength data collection. The experiment proves that the acceleration sensor designed in this paper can be used for acceleration sensing on the bridge.