应用施瓦兹导数及符号动力系统对六辊ＵＣ模型的混沌动力学性质进行深入分析，证明该模型经倍周期通向混沌，对特定控制参数得到其周期点的轨道性质及三周期的存在性；利用ＯＧＹ控制方法，对该迭代模型进行了混沌控制，为从根本上提高六辊ＵＣ轧机轧的轧制精度提供了一种新的控制思想． Applying Schwartz’s derivative and symbolic dynamic system, the chaotic dynamics of the six-roller UC model are analyzed. It is proved that the model leads to chaos through double cycles and the orbital properties and the existence of three cycles for the specific control parameters By using OGY control method, the chaotic control of the iterative model is provided, which provides a new control idea for fundamentally improving the rolling precision of six-roll UC rolling mill.