Abstract: The aerodynamic noise of cavity flow is a concern problem due to the complex and serious dynamic fluctuation, the goal of this paper is to study the numerical prediction method of aerodynamic noise generated by high subsonic cavity flow. With the help of Green's function satisfied arbitrary boundary conditions and Lighthill's Acoustic Analogy, the aeroacoustic integral computational method taking into account the influence of physical boundary is presented. The numerical calculation includes two parts, flow and noise computations. The two-order DDES model is used to perform the fluid simulation while the present integral computational method calculates the distribution of scattering noise. Numerical results show that the distribution of noise field varies periodically, and it is in agreement with fluid fluctuation. The SPL gradually reduces with frequency and appears higher amplitudes at harmonic frequencies. Numerical results obtained with the present method agree well with that of high-order aeroacoustic computational method, which indicate that this method is valid and efficient to calculate high subsonic cavity noise.