为提高型钢尤其是复杂断面型钢连轧时机架间张力的控制精度，研究了一种智能化微张力控制系统。通过对预张力变化值的直接数据采集，该系统在计算机控制下调整主电机转速，以保持秒流量相等，实现轧制过程中轧件尺寸稳定。该系统还可以根据数学模型及轧件尺寸自行确定控制张力的大小。 In order to improve the control accuracy of the tension between the racks during the profile section rolling, especially the complicated section rolling, an intelligent micro tension control system is studied. Through the direct data acquisition of the value of the pre-tension, the system adjusts the main motor speed under the control of the computer to keep the flow of the second equal and realize the dimension stability of the rolling during the rolling process. The system can also be based on mathematical models and rolling size to determine the size of the control tension.