The invention relates to a wing shearing force real-time monitoring method based on the measured strain of a fiber bragg grating (FBG). The method comprises the specific steps of 1, arranging a fiber grating sensor on a wing; 2, obtaining the measured strain of the fiber grating sensor; 3, analyzing the shearing force state of the wing; 4, calculating the shearing force of the wing. Based on the above steps, the measured strain data of the fiber grating sensor arranged on the wing, the shearing force of the wing is calculated and obtained. Therefore, only based on the measured strain of the fiber bragg grating, the shearing force of the wing is obtained without obtaining the information of the load of the wing, the structure of the wing and the like. As a result, the actual problem that the shearing force of the wing can be monitored in real time only based on the measured strain of the fiber bragg grating can be solved.