The hangers of suspension bridges at each hanger point are composed of 2 or 4 cable bundles，and the close proximity of cable bundles in each hanger may induce complex wind-induced vibrations. In this study，wind-induced vibrations of twin cable bundles with various distance of gap are investigated by wind tunnel tests and its vibration control is treated with the lever-type tuned mass dampers（LT-TMD）. The wind-induced instability of coupled parallel twin hanger ropes are investigated by elastically-supported section model wind tunnel tests.The optimal parameters of the LT-TMD to control the wind-induced instability are derived based on the self-exciting force model，and the effect of the dynamic parameters of the LT-TMD on control is discussed. The wind tunnel tests of coupled parallel hanger ropes installed a LT-TMD are carried out. The results of this study indicate that：1）the couple parallel hanger ropes tend to suffer from larger amplitude wind-induced vibrations as the wind attack range is in the range from 6° to 10°；2）compared with the optimal design of LT-TMD based on the harmonic external exciting model，the optimal design based on the self-exciting force model can significantly reduce the mass of the LT-TMD；3）LT-TMD can effectively improve the on-set wind speed of wind-induced instability，the deviation of dynamic parameters for the LT-TMD will reduce the vibration reduction effect，especially for the frequency deviation.