In order to study the visible light communication system in the case of non-line-of-sight link, this experiment establishes a non-line-of-sight link communication space model. On such basis, this paper designs the sender and receiver of the visible light communication system to complete the communication based on the non-line-of-sight link. The experimental results show that in the process of visible light communication, when the receiver only receives the signal transmitted by the non-line-of-sight link, the communication system can still complete the communication normally, non-line-of-sight communication can solve the problem that communication cannot be carried out because of the line-of-sight light is blocked.