Abstract: To make up for the deafness of ultraviolet directional communication, a multi-channel media access control protocol for airborne ultraviolet communication based on space division multiplexing was designed and an ultraviolet communication network model was established. Several UV transceivers with different directions were installed on an ultraviolet node to realize multi-channel information exchange. The performance of the new protocol was simulated and evaluated. The results show that compared with the single-channel communication protocol, the multi-channel communication protocol has the characteristics of low delay and high throughput so that the deafness problem can be significantly alleviated and the network performance is greatly improved. Three-channel communication mode is the best option.