对冷带轧机常会发生的120～250Hz颤振现象进行分析,建立了新的颤振动力学模型并进行了过程仿真,说明这种颤振是轧制过程本身潜在的不稳定性随轧速升高达到临界值时发生的自激振动。临界轧速随轧制工艺参数和轧制特征而变化。指出了国外对轧机颤振理论研究中存在的某些失误。根据仿真揭示的规律提出轧机设计及操作中可采取的防振措施。 The flutter phenomenon of 120 ~ 250Hz, which often occurs in the cold strip mill, is analyzed. A new flutter dynamics model is established and the process simulation is carried out. It shows that the flutter is the potential instability of the rolling process itself as the rolling speed increases Self-excited vibration that occurs when the critical value is reached. Critical rolling speed varies with rolling process parameters and rolling characteristics. Some mistakes in the research of rolling chatter theory are pointed out. According to the law revealed by the simulation, the rolling mill design and operation can take the anti-vibration measures.