Most of the existing methods to enhance the security of optical transmission network are based on the network level and cannot guarantee the security of optical transmission equipment, this paper proposes to introduce the pseudo defense technology into the management and control system of optical transmission equipment, and designs a redundant heterogeneous multi-core architecture. Based on the system similarity, the attack probability model is constructed and verified by simulation. The results show that the proposed method significantly reduces the probability of successful attack and greatly improves the security performance of pseudo software defined optical network transmission system.