The multi-channel access technology of MAC (Media Access control) is studied for wireless UV light scattering communication. The three modes of UV (ultraviolet light) NLOS (no-line-of-sight) communication are analyzed. Multi-interface and multi-channel sets of UV transceiver are deployed in each node. Both the communication node model and the UV channel model are established, and the access technology of multi-channel is studied. Three modes of UV NLOS multi-channel communication are stimulated in different topologies with NS2. The results show that the UV multi-channel access technology can increase the effective network throughput with using multiple channels.