This paper is concerned with the robustness of guaranteed cost control for uncertain linear systems.The concept of robust bounds for uncertain systems with guaranteed cost control design is proposed.Parameter dependent robust bounds for guaranteed cost control systems with unstructured or structured uncertainties are derived.An optimization problem of improving the robustness of guaranteed cost control systems with structured uncertainty is presented.The corresponding optimization technique is also given.%研究不确定线性系统保代价控制的鲁棒性分析问题.提出了不确定线性系统保代价控制鲁棒界概念，给出了不确定线性系统保代价控制的一种鲁棒性分析方法，并建立了不确定线性系统的参数可变保代价控制鲁棒界.针对一类结构不确定线性系统，进一步给出了保代价控制鲁棒界的一种优化算法，并用实例加以验证.
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