Abstract: Abstract: In the light of single point failure, Byzantine fault, static configuration and other security problems in the SDN networks, In order to solve the Byzantine fault, defense the unknown vulnerabilities and back doors, enhance the dynamic of the network, a SDN architecture based on Byzantine protocol is proposed，and the dynamic controller view election algorithm is designed. The dynamics, heterogeneity and redundancy is introduced into the SDN, so that the attack chain is broken and the capabilities of network active defense is enhanced. Based on the quantification of the controller’s heterogeneity, the two stage algorithm is designed to seek for the controller view. Simulation results show that, the structure of the heterogeneous Byzantine protocol is more resistant to attack, compared with the p-b structure.