The invention provides a magneto-rheological buffer which comprises a magneto-rheological damper, an elastic component, a first connecting component, a second connecting component and a third connecting component. The two ends of the magneto-rheological damper are connected with the first connecting component and the second connecting component in a detachable manner, the elastic component is located between the second connecting component and the magneto-rheological damper, and the third connecting component is arranged at the end, far away from the magneto-rheological damper, of the second connecting component in the detachable manner. The elastic component has a pre-compression amount enabling the magneto-rheological damper to reset. The first connecting component is connected with themotion end, and the third connecting component is connected with the fixed end. Dual adjustment of the damping force and the rigidity can be achieved, and the response speed is high.