Abstract: For expanding communication network available bandwidth and optimizing the distribution of the intelligent network resources, a cognitive radio network routing method for smart grid-oriented ad hoc communication protocol is proposed. Based on the principle of minimum energy consumption and the smallest time delay, the spectrum allocation scheme and transmission rate are studied according to the requirement of the number of nodes and transmission rate. The aim is to provide a new design idea for building a highly efficient and stable ad hoc smart grid communication network. The numerical simulation shows that the performance achieved is superior to the traditional algorithms, and the method is suitable for smart grid applications.