Aiming at the problem that the indoor white light visible light communication system basically focuses on the research of direct link and ignores the practical application value of diffuse link, by establishing a closed experimental space environment, the visible light communication experimental system is designed to measure the spatial distribution law of diffuse reflection signal. The feasibility of the application of diffuse reflection signal in practical environment is explored, and the white light visible light communication experiment based on diffuse reflection is carried out. The experimental results show that diffuse reflection provides a solution to the problems such as signal interruption caused by blocking and shadow in the direct link of visible light communication and poor communication quality in indoor corners.