Abstract: In allusion to problem of blind area of distribution communication network, the paper proposed an extension scheme for distribution communication network combined with wireless ad hoc network. It introduced common used wireless ad hoc networks, network structure and performance analysis of WIA, and three-layer structure of the scheme. The scheme achieves data transmission of blind area by use of multi-hop performance and ad hoc performance of wireless ad hoc network. The practical application results showed that the scheme not only has low cost and power consumption, but also has advantages of short transmission time and high security.