For a super-long-span cable-stayed bridge, it is often required that the main tower be essentially elastic under a strong earthquake. Therefore, a seismic isolation structural system is often used to reduce the seismic response. Since the seismic displacement at the end of the deck may severely exceed the allowance, the elastic link device and viscous damper are often employed to control the displacement. In this article, a new damper (Metal Alloy Brace) is used to achieve this goal. Under the frequently occurred earthquake excitation, MAB’s hysteretic curve is plump, so the structural deformation is reduced. Under rare earthquake excitation, MAB can supply so big stiffness that the structural deformation is limited, and the damper will also dissipate much energy. And the damper has no problem with leakage and metamorphism. So, the prospect of MAB is brightening.