Abstract: To create a healthy and comfortable indoor environment, there are clear requirements for indoor acoustic comfort. The sound insulation of air-borne acoustic pathway is the most important physical quantity reflecting the acoustic quality of buildings. Controlling the indoor noise level of buildings has become an important work of indoor environment design. In this paper, the sound insulation performance of light-weight wall is studied, and the effects of stud types, stud spacing, cavity filling material types, filling material thickness, number of panel layers and panel quality on the sound insulation performance of light-weight structure wall are analyzed. The test results show that expanding independent panel size, increasing the stud spacing, filling wall cavity with rock wool or glass wool, increasing the number of panel layers, improving panel quality and avoiding structural connection has a positive effect on optimizing the sound insulation performance of the light wall with double-leaf structure.