Abstract: Composite structure of network topology modeling and optimal decision control robustness analysis can improve the anti-interference ability of combination network control structure. In the process of combination network optimal decision control, vulnerable to the interference of environmental factors, unable to form a fixed control decisions, influence the combination network decision-making control robustness test. Based on the combination of the probabilistic parsing algorithm network control structure of robustness test method. Screening combination in the network robustness control structure influencing factors, establish robust factors affecting the data collection, robustness and the different weights of affecting factors to calculate. Combination according to the related theory, probabilistic parsing algorithm for network optimal decision control robustness sensitivity function and data transmission function, the influential factors of robustness for accurate analysis of the structure. The experimental results show that the improved algorithm are combined in the network robustness analysis, optimal decision control structure can improve the accuracy of analysis, meet the actual demand of combination of network application.