The complex network theory provides a new perspective in the study of operational network, a powerful method to investigate the relationship between network structure and function. To study the load-induced cascading failure of interdependent operational networks, two-layered asymmetrical interdependent network is constructed according to the interactive relationship of military system. Then, an improved "load-capacity" model based on local load redistribution is proposed to study the edge failure and load transfer, and the computation complexity of the cascading model. Thirdly, the influence of edge load and capacity on the cascading invulnerability is simulated under malicious edge attacks and compared with a WS-WS symmetrical interdependent network. The results show that the robustness against malicious attacks is positively related to the capacity, yet negatively to the load either in isolated or interdependent state. A short plateau appears in the progress of cascading due to the hierarchical weighted structure of C2 subnet under isolated status. The cascading invulnerability of asymmetrical interdependent operational networks is worse than the symmetrical one. The two subnets in the former network have different invulnerability performances, while the subnets in the latter system almost have the same performance.