The light intensity scintillation of Airy beam is analyzed based on von-Karman model and Rytov method. According to the uneven distribution of light intensity on the receiving plane of receiver, a surface light intensity scintillation model of Airy beam is proposed, and surface light intensity scintillation expressions of Airy beam are derived. The simulation results show that, when the beam width is fixed and the propagation distances are equal, the smaller the exponential truncation factor is, the smaller the light intensity scintillation is. The smallest light intensity scintillation of Airy beam is achieved with propagation distance of 3 km, exponential truncation factor of 0.2 and beam width around 1.6 cm. Furthermore, the light intensity scintillation of Airy beam is smaller than that of Gaussian beam with the same light source intensity and receiving light intensity.