Abstract: Aiming at the influence of high-precision airborne antenna structure deformation on electrical performance, the paper proposes a method for real-time measurement and compensation of antenna dynamic deformation. Base on the high angle, real-time and narrow measurement space requirements and difficulties of the airborne antenna, the paper proposes a method based on fiber grating sensor for strain measurement. At the same time, the principle and construction process of the measurement method are explained and tested.The test results show that the measurement method can obtain the dynamic deformation of the airborne antenna due to wind load and temperature in real time, and the real-time compensation of the electrical performance distortion of the antenna can be performed on this basis.