Abstract: The three-dimensional modeling calculation of electric thermal acoustic coupling of graphene film is carried out, and the calculation results are compared with experimental data. Firstly, a three-dimensional Joule heat model of graphene film is established to calculate the temperature oscillation and steady-state temperature distribution of graphene film. On this basis, the acoustic diffusion model combining viscous acoustics and pressure acoustics is established, and the distribution of sound pressure in space is calculated. Then the effects of substrate and air parameters on the sound emission of graphene films are analyzed. Finally, the temperature and sound pressure of the graphene films are measured. The results show that: The temperature distribution calculated by the three-dimensional model agrees well with the measured temperature distribution. The numerical results are closer to the experimental values than the one-dimensional approximate analytical solution, which verifies the effectiveness of the numerical method. The numerical method of three-dimensional model has more advantages in analyzing the acoustic performance of thin films in complex boundary conditions.