Aiming at the shortcomings of failure to meet the actual application requirements of double-layer vibration isolation in low frequency area,a method of supplemental mechanical adaptive tuned vibration absorber is proposed.And the method is implemented by model test.Then the acceleration response curve of the object system is measured under different combinations of steel thickness and masses weight.The results show that the device can broaden the working frequency of absorber and improve the vibration isolation effect in low frequency.Thus,it provides a feasible scheme for control of high precision equipments.