Through a test on a 350-300 cold mill unit at a plant,the paper analyses its tension system and the cause of inconstancy in coiling tension and suggests some measures forits improvement.

• 通过对某厂350-300冷轧机组的测试，分析了其张力制度，并应用恒张力控制原理分析了卷取张力不恒定的原因，提出了改进措施。