Abstract: To provide a reference for planning and designing wireless multi-hop ad hoc networks, the influences of physical-layer network coding and network coding diversity on the connectivity of wireless multi-hop ad hoc networks were analyzed. The theoretical and numerical analyses of the network sustained routing hop were carried out. The reserach result shows that compared with a physical-layer network coding cooperative transmission, the network coding diversity cooperative transmission can improve the sustained routing hops in wireless multi-hop ad hoc networks greatly, and the gain can be up to above 3 to greatly improve network connectivity to enhance network throughput.