The skein body is driven by an AC variable frequency motor. The skein body can rotate clockwise or counterclockwise. The skein body is equipped with a pneumatic brake device for emergency braking. The whole equipment is equipped with 2 microwave transmitters to detect the diameter of one of the yarn groups online. And feedback to the PLC to automatically calculate and adjust the tension. When the microwave transmitter does not detect the diameter of the yarn group online, the device allows the input of the initial diameter of the yarn group, production speed and other parameters, and compares with the curve to control the pay-off tension in an open loop. The guide wheel and the guide sleeve are made of ceramic material or magnetic spray guide wheel (the diameter of the spray magnetic guide wheel ≥ Φ80), with a smooth surface, high smoothness, and wear resistance, which can effectively reduce the fuzzing of the aromatic wheel yarn.