A graphene sound generator based on laser scribing is studied in this article. To study the influence of graphene sound generators with different structures on the output performance, four structures of graphene sound generators with solid, coarse mesh, medium mesh and fine mesh are designed. First, the thermoacoustic conversion models of solid structure and mesh structure are formulated, respectively. Then, the fabrication process and SEM characterization of laser scribed graphene are given. Finally, the output performance of graphene sound generators with four structures is measured. Experimental results show that the solid structure has the best output performance. The maximum SPL reaches 40. 68 dB in the conditions of 20 kHz with 5 cm distance when the input power is 0. 78 W. It is found that in the range of 0~ 0. 78 W, for every 0. 1 W increase in input power. The theoretical SPL is increased by an average of 2. 58 dB, and the experimental SPL is increased by 2. 48 dB on average. These results are basically consistent with the theoretical model. The graphene sound generator based on laser scribing has advantages of low cost, simple preparation, good acoustic performance, which can be widely applied in the fields of biology, medicine, and wearable electronic devices.